• 把光说清楚 17|健康照明/综合照明基础十八讲

    从光配方到可计算、可采购的系统规格

    目标只有被写进条件、接口与容差,才有机会在现场实现

    作者|林纪良 Lawrence Lin

    GLGA 主席|GLG 董事会成员|IWBI WELL Light Concept Advisor|LRS 创始人兼 CEO

    不少方案写着“早晨活力光、午间专注光、夜间舒缓光”。词很漂亮,招标时却不知道该买什么;灯具进场后,各厂家用不同协议,调试人员只能凭感觉调色。

    光配方不是几个场景名字,而是一组与人、位置、时段和活动绑定的性能目标。它必须经过计算、样板、采购数据和控制接口,才能从概念走到工程。


    一张合格的场景规格应写什么

    先写适用人群与活动,再写运行时段和持续时间;随后定义工作面照度、眼睛位置 mel-EDI、眩光、颜色质量、调光范围和时间光调制要求;最后写清测点、方向、容差、日光条件与人工覆盖方式。

    例如“日间办公场景”不能只写 250 lx mel-EDI。还应说明坐姿眼位、主要朝向、目标覆盖比例、工作面视觉要求、窗帘状态和维持时段。夜间场景则要同时保留通行与任务安全。


    采购的不是一颗数字

    供应商应提供不同 CCT 与调光状态的光谱数据、配光文件、颜色质量、效率、时间光调制和控制兼容性。若只提供额定功率下的单点检测,设计团队无法预测真实场景。

    系统规格还应明确驱动器最低稳定输出、调光曲线、地址与分组、传感器、遮阳联动、数据记录和维护替换原则。否则同型号更换驱动器后,整个配方可能改变。


    仪器在这里扮演什么角色

    方法先于仪器。 先定义要回答的问题,再选择照度计、光谱辐射计、亮度测量与时间光调制设备。

    以 In.Licht 一类综合测量工具为例,它的价值不是替设计做决定,而是在相同测点和场景下记录光谱、照度及 α-opic 量,帮助团队比对设计与现场。

    没有明确测量协议,再好的仪器也只会产生更多孤立数字。


    目前可以说/还不能说

    目前可以说: 可执行的光配方应包含目标、条件、设备数据、控制逻辑、容差和验证方法。

    还不能说: 购买某类可调灯具或测量仪器,就等于完成综合照明系统。


    今天就能做的三件事

    • 把每个场景改写成“人+活动+时段+目标+测点+控制”。
    • 招标前统一光谱、配光、调光与控制数据格式。
    • 用一比一样板验证最亮、典型与最低调光状态。

    证据标签:工程实践。 性能化规格与可追溯数据能提高实现率;具体容差应由项目设定。


    参考资料

    • CIE S 026:2018:https://www.cie.co.at/publications/cie-system-metrology-optical-radiation-iprgc-influenced-responses-light-0
    • ANSI/IES RP-46-25:https://store.ies.org/product/recommended-practice-supporting-the-physiological-and-behavioral-effects-of-lighting-in-interior-daytime-environments/
    • CIE TN 012:2021:https://cie.co.at/publications/guidance-measurement-temporal-light-modulation-light-sources-and-lighting-systems

    下一篇,也是本系列最后一篇:验收为什么不能只测一次 lux,以及怎样让设计、调试与验证真正闭环。

  • 把光说清楚 16|健康照明/综合照明基础十八讲

    先定义人,再定义光:五维需求模型

    用“光—人—空间—时间—活动”避免一上来就选灯

    作者|林纪良 Lawrence Lin

    GLGA 主席|GLG 董事会成员|IWBI WELL Light Concept Advisor|LRS 创始人兼 CEO

    设计会议最常见的开场是:“这里用 4000 K 还是 3500 K?

    ”当团队从产品参数开始,往往已经跳过了更重要的问题:谁在这里、什么时候来、做什么、待多久、朝哪里看?

    我习惯用五个维度整理健康照明需求:光、人、空间、时间、活动。

    五者不是新标准,而是一种避免遗漏的工作方法。先把关系说清,灯具和控制才有依据。


    光:我们能设计和测量什么

    包括光谱、数量、方向、分布、持续时间、变化速度、显色、眩光与时间光调制。

    这里既有视觉指标,也有 α-opic 指标。每个目标都应对应测量方法。


    人:谁真正使用空间

    记录年龄、视觉能力、主要作息、工作班次、特殊敏感性和自主控制需求。

    不要只写“办公人员”或“住户”,那还不够成为设计输入。


    空间:光经过怎样的建筑

    窗户、朝向、尺度、材料反射、家具和隔断会重塑光。

    一个好的光谱若被装进错误配光与暗色空间,眼睛仍可能收不到预期暴露。


    时间:目标在什么时候成立

    至少划分日间主要活动、傍晚、睡前三小时、睡眠和夜间短时活动。

    不是所有项目都需要不断动态变化,但必须知道什么时候应该高、什么时候应该低。


    活动:人在此刻要完成什么

    阅读、精细操作、交流、放松、起夜、护理与屏幕工作,对照度、方向、眩光和控制的要求不同。

    同一房间可能在一天内承担多个活动,场景便由此产生。


    一个病房的五维翻译

    白天患者需要明亮、有时间线索的环境,医生需要检查与阅读,访客需要交流;

    夜间患者需要安静低刺激,护理人员仍要安全操作。

    设计不能只给房间一个“病房照度”,而要为不同人、时间和活动建立不同但相容的光场景。


    目前可以说/还不能说

    目前可以说: 五维模型能把模糊的“以人为本”转换成可讨论、可计算的输入,并减少产品先行。

    还不能说: 填完五个栏目就自动得到健康结果;它仍需要标准、专业判断和现场证据。


    今天就能做的三件事

    • 方案前开一次只谈人、时间和活动、不谈灯具型号的需求会。
    • 为每个主要场景写一句“谁在何时做什么”。
    • 给每个目标补上测点、方向、时段和验证方法。

    证据标签:实践框架。
    它用于组织需求,不冒充科学阈值或认证体系。


    参考资料

    • CIE — Integrative Lighting:https://cie.co.at/eilvterm/17-29-028
    • CIE PS 001:2024:https://cie.co.at/publications/cie-position-statement-integrative-lighting-recommending-proper-light-proper-time-3rd
    • ISO/CIE 8995-1:2025:https://www.iso.org/standard/76342.html

    下一篇,我们把这张需求地图继续向前推进:怎样把“光配方”变成可计算、可采购、可调试的系统规格?

  • 把光说清楚 15|健康照明/综合照明基础十八讲

    日光、电光与控制,谁才是主角?

    真正的主角不是设备,而是一天之中稳定、合适的光环境

    作者|林纪良 Lawrence Lin

    GLGA 主席|GLG 董事会成员|IWBI WELL Light Concept Advisor|LRS 创始人兼 CEO

    有些项目把健康照明理解成采购一套可调色温灯;另一些项目则认为只要有大窗,就不必再谈电光。两种看法都低估了建筑的现实:日光丰富却变化,电光稳定却需要能源,控制决定二者能否在正确时间合作。

    日光通常是白天获得高水平光暴露的重要资源;电光用来补足、平衡与延伸;控制则根据时间、天气、遮阳和活动,把两者组织成可用的系统。


    日光的价值与代价

    日光能提供高照度、丰富光谱和时间线索,也能把人与室外环境连接起来。

    但它会带来眩光、过热、反射和不均匀。靠窗位置可能过亮,空间深处却仍然不足。

    因此,“多开窗”不是完整策略。建筑朝向、窗墙比、遮阳、玻璃、室内反射与工位方向,需要一并考虑。

    良好日光设计往往从建筑早期开始,而不是装修阶段补救。


    电光不是日光的仿制品

    电光的优势是可控、稳定、可在需要时补充眼睛方向和任务面上的光。

    它不必机械复制每一分钟的天空色温,而应补足日光不足、控制眩光并维持视觉质量。

    在空间深处,可通过明亮墙面、大面积柔和发光或间接照明提高视野亮度;晚间则应能充分调暗,并保留安全、易操作的局部照明。


    控制决定方案能不能活下来

    一个没有调试的自动系统,可能在阴天频繁跳变,也可能与遮阳互相打架。控制策略至少要说明传感器位置、时间表、调光曲线、最小输出、人工覆盖方式与断电恢复逻辑。

    用户愿意使用,系统才有持续效果。手动控制不是失败,而是应被设计进去的反馈通道。


    目前可以说/还不能说

    目前可以说: 日光、电光、遮阳与控制应协同,形成随时间变化但不过度打扰的光环境。

    还不能说: 有窗就自然满足所有日间目标,或安装可调白灯就自动成为节律照明。


    今天就能做的三件事

    • 建筑早期同步模拟日光、眩光与眼睛方向暴露。
    • 为晴天、阴天、清晨、白天和夜间建立少而明确的控制场景。
    • 调试后观察用户是否频繁覆盖自动控制,并据此修正逻辑。

    证据标签:已有共识/可谨慎应用。
    综合利用日光与电光是稳健方向;具体动态策略需要项目验证。


    参考资料

    • CIE PS 001:2024 :https://cie.co.at/publications/cie-position-statement-integrative-lighting-recommending-proper-light-proper-time-3rd
    • ISO/CIE 8995-1:2025 :https://www.iso.org/standard/76342.html
    • CIE Technical Reports — Daylight and Glare:https://cie.co.at/publications/technical-reports

    下一篇,我们给设计建立一张地图:先定义人,再从光、人、空间、时间、活动五个维度定义需求。

  • 把光说清楚 14|健康照明/综合照明基础十八讲

    看不见的闪烁,仍然是照明质量

    从“眼睛看不出来”走向可测量的时间光调制

    作者|林纪良 Lawrence Lin

    GLGA 主席|GLG 董事会成员|IWBI WELL Light Concept Advisor|LRS 创始人兼 CEO

    样板间里,肉眼看不出灯在闪,手机相机却出现黑色条纹。供应商说“手机不专业,不代表有问题”;用户又担心“看不见的频闪一定伤脑”。两种说法都太绝对。

    光输出随时间变化,称为时间光调制。它可能引发可见闪烁、运动中的频闪效应或快速眼动时的幻影阵列。是否被察觉、是否造成不适,取决于频率、调制深度、波形、亮度、视野和观察者。


    手机只能提示,不能定量

    相机滚动快门会放大或制造条纹,因此可用于快速发现线索,却不能替代合适仪器。

    严谨测量要有足够采样率、合适的光探头和明确的测量条件,并分析光输出随时间的波形。

    “频闪百分比”也不是万能指标。同样的调制深度,在不同频率和波形下,视觉影响可以很不一样。项目需要采用与应用相符的评价指标和限值来源。


    调光往往是问题高发区

    不少灯具在额定满功率时表现良好,调到 10% 或与不同控制器配对后,时间光调制明显增加。可调白系统还可能在两路光源混合时出现新的波形。

    所以,检测不能只做“出厂最优状态”。

    住宅晚间、教室演示、办公室节能和酒店低照度场景,都可能运行在低调光区,恰恰是最该测的状态。


    健康照明不能只看节律

    如果系统为了夜间降低 mel-EDI 而采用不稳定的低水平调光,就可能用一个问题换来另一个问题。

    综合设计要求光谱、亮度、控制和驱动器共同工作。


    目前可以说/还不能说

    目前可以说: 时间光调制可被测量,并可能产生多种视觉伪影;驱动与调光状态是关键条件。

    还不能说: 手机无条纹就证明“零频闪”,或所有肉眼不可见的调制都会造成同一种健康伤害。


    今天就能做的三件事

    • 在 100%、典型工作档和最低常用调光档分别测量。
    • 把灯具、驱动和控制器作为完整系统测试。
    • 产品资料写明测量方法、频率、波形与运行条件,不只写“无频闪”。

    证据标签:已有共识/开放问题。
    视觉伪影的测量与部分效应已有标准化方法;更广泛的长期健康影响仍需研究。


    参考资料

    • CIE TN 012:2021:https://cie.co.at/publications/guidance-measurement-temporal-light-modulation-light-sources-and-lighting-systems
    • CIE 249:2022:https://www.cie.co.at/publications/visual-aspects-time-modulated-lighting-systems
    • IES TM-18-18:https://store.ies.org/product/tm-18-18-light-and-human-health-an-overview-of-the-impact-of-optical-radiation-on-visual-circadian-neuroendocrine-and-neurobehavioral-responses/

    下一篇,我们把视野拉回建筑:日光、电光与控制,究竟谁才是健康照明的主角?

  • Europe’s Lighting Leaders: Where Will the Next Growth Come From?

    Europe’s Lighting Leaders: Where Will the Next Growth Come From?

    Europe’s Lighting Leaders: Where Will the Next Growth Come From?

    By Lawrence Lin
    Founder, Lighting Recipe Studio · Chair, GLGA
    Former Global CEO, LEDVANCE

    European industry perspective · Information cut-off: 7 September 2026

    Europe’s lighting companies have become fluent in explaining difficult markets. Weak construction, deferred investment, price pressure and the contraction of conventional lamps recur throughout their financial commentary. The responses are familiar too: restructuring, simpler organisations, fewer products, asset disposals and leadership changes.

    These pressures are real. Protecting cash and restoring profitability are essential responsibilities. Yet an uncomfortable question remains: can the industry explain its next source of customer value as clearly as it explains its recent decline?

    Europe has built substantial expertise in optics, industrial design, architectural specification and application engineering. That heritage creates an opportunity, and a reasonable expectation of leadership. Customers should be able to see what these capabilities will deliver next—in their buildings, their working environments and their homes.

    The concern is that a mature market can gradually become an excuse for limited ambition. Energy efficiency and environmental responsibility remain indispensable. They cannot, on their own, explain why a customer should choose one competent supplier over another.

    The next phase of growth will depend on meaningful research, better products and reliable delivery. If established lighting businesses do not turn those capabilities into solutions customers value, the brands that organise lighting within intelligent homes and buildings may increasingly come from elsewhere.

    Author’s disclosure: I previously served as Global CEO of LEDVANCE and as Senior Adviser, Asia Pacific, to Zumtobel Group, with the latter appointment ending on 30 June 2026. This article reflects on an industry whose management decisions I have also helped shape. Company assessments below draw on the sources identified in the references.

    Financial resilience is only part of the answer

    Recent results show considerable variation. Some businesses have improved profitability without much revenue growth. Others have expanded into adjacent electrical products, while several major lighting groups have experienced pressure on both sales and margins.

    Business Revenue development Operating profitability What the figures invite us to examine
    Signify €6.704bn in 2023 to €5.765bn in 2025 Adjusted EBITA margin: 10.0% to 8.9% Whether connected products and services can offset the contraction elsewhere
    Zumtobel Group €1.127bn in FY2023/24 to €1.040bn in FY2025/26 Adjusted EBIT margin: 5.1% to 4.1% Different recovery prospects in luminaires and components
    Fagerhult Group SEK8.560bn in 2023 to SEK7.891bn in 2025 Operating margin: 10.5% to 7.7% Whether a broad brand portfolio produces sufficient differentiation and returns
    Luceco £209.0m in 2023 to £271.4m in 2025 Adjusted operating margin: 11.5% to 12.5% How much growth comes from existing operations and how much from acquisitions
    F.W. Thorpe Approximately £175–177m across FY2023–FY2025 Statutory operating margin: approximately 15.8% to 18.3% How specialised delivery and service support profitability

    These are group figures, including international operations and, in some cases, substantial non-lighting activities. Fiscal calendars and profit definitions differ. The table compares each business with its own earlier performance; it is not a ranking of comparable European lighting margins. Sources: the company reporting resources listed below.

    Low growth is not necessarily poor management. A mature business can create considerable value through dependable cash generation and disciplined investment. However, leadership also involves developing future demand. A stronger margin after restructuring is welcome; it does not establish that customers have acquired a new reason to buy.

    Europe needs a broader proposition for light

    For building owners, the relevant decision is often whether an upgrade justifies disruption, installation costs and a long-term maintenance commitment. A more efficient luminaire helps, but the full proposition includes design, compatibility, commissioning, reliability and service.

    Europe’s renovation agenda creates room for that broader offer. The revised Energy Performance of Buildings Directive treats lighting and building automation within the wider performance of technical building systems. The commercial opportunity lies in helping owners achieve workable improvements in existing buildings, where equipment from different generations and suppliers must coexist. [1]

    This calls for practical innovation. Can an installer commission a system more quickly? Can an owner replace a failed component without replacing the entire installation? Can lighting work reliably with other building controls? Can a designer improve visual comfort while retaining flexibility for future changes of use?

    Environmental claims also need to become more tangible. Repairability, durable components, documented material choices and accessible maintenance can influence purchasing decisions when they reduce lifecycle cost or uncertainty. Repeating a general commitment to sustainability provides much less differentiation.

    Price competition deserves the same scrutiny. It can reflect excess capacity and purchasing pressure, but it can also reveal that buyers see too little difference between competing offers. Management cannot control the construction cycle. It can influence whether its products remain interchangeable in the customer’s eyes.

    Signify: a connected installed base still needs an economic case

    Signify illustrates the scale of the transition. Sales fell by approximately 14% between 2023 and 2025, while its adjusted EBITA margin declined from 10.0% to 8.9%. Free cash flow remained substantial: €586m in 2023, €438m in 2024 and €440m in 2025. Cash provides capacity to invest, but it does not remove the growth challenge. [2]

    The reported connected light-point base increased from 124 million in 2023 to 167 million in 2025. This is an important measure of deployment, but a cumulative installed base is not equivalent to recurring revenue or a disclosed number of paying software customers.

    The commercial test is whether connectivity improves retention, supports additional services and produces acceptable returns after development and support costs. The industry needs greater clarity on those outcomes before treating connected volume as proof of a transformed business model.

    Signify’s June 2026 strategy set medium-term ambitions of 0–1% comparable sales growth, approximately 10% adjusted EBITA margin and a 7–8% free-cash-flow margin. Those targets acknowledge a restrained growth environment. They also make the quality of resource allocation especially important. [39]

    As Tempelman’s arrival from the energy sector brings experience relevant to this broader agenda. His appointment creates an opportunity to connect lighting expertise with building and energy requirements. The evidence of success will come from execution, customer adoption and cash returns. [3]

    Zumtobel and Tridonic: two recovery challenges within one group

    Zumtobel’s results show why a group average can obscure the operating task. In FY2025/26, lighting revenue declined by 3.7%, yet adjusted EBIT rose from €51.3m to €54.7m. Components revenue fell by approximately 11%, with adjusted EBIT declining from €13.5m to €4.6m. The two businesses require different responses. [4]

    For professional luminaires, specification, design and application support can help defend value. For components, technical differentiation has to withstand demanding procurement processes and competitive pricing. A driver or control device becomes more valuable when it improves system performance or reduces integration effort; connectivity alone does not ensure pricing power.

    Heiner Lang joined the management board on 1 September 2026 and is scheduled to become CEO on 1 October. His industrial automation background is relevant to the group’s development, while preserving its optical and application knowledge will remain essential. [5]

    First-quarter FY2026/27 sales were €264.1m, down 0.9%, with adjusted EBIT of €8.2m and a 3.1% margin. These results precede the incoming CEO’s tenure and should be assessed accordingly. A leadership transition can establish priorities, but recovery must be demonstrated over subsequent reporting periods. [6]

    Fagerhult, Luceco and F.W. Thorpe: different routes to value

    Fagerhult’s portfolio includes businesses built around architectural specification, local professional markets and infrastructure. Its revenue fell by approximately 7.8% between 2023 and 2025, and operating cash flow declined from SEK1.209bn to SEK740m. Brand breadth has not insulated the group from weaker demand. [7]

    The acquisitions of Trato TLV and Capelon add exposure to specialised applications and connected outdoor lighting. Their strategic logic is understandable. Their long-term value depends on whether they improve customer access and capabilities at a return that justifies the capital invested.

    Multiple brands can preserve local expertise and distinct relationships with specifiers. They can also duplicate costs. The relevant question is whether each business has a clear role and whether shared resources make the portfolio more effective.

    Luceco presents a different picture. Revenue and adjusted operating profitability improved between 2023 and 2025, with free cash flow reaching £30.4m in 2025. Its activities extend across wiring accessories, LED lighting, EV charging and portable power. Acquisitions, including D-Line and CMD, contributed to the expansion. These are the results of a broader electrical-products business, not a measure of organic lighting-market growth. [8]

    Its experience makes adjacency worth studying. Products that share customers, installation channels and engineering capabilities may offer a credible route to expansion. Diversification becomes less convincing when it merely increases the number of separate businesses management must support.

    F.W. Thorpe offers another model. Revenue remained broadly stable across FY2023–FY2025, while statutory operating margins improved. In FY2025, operating cash flow was £33.2m and cash plus short-term financial assets reached £61.8m. [9]

    Thorlux’s offer extends from surveys and design through installation, commissioning and after-sales support. Continued development of SmartScan connects product engineering with the practical operation of installations. This is a concrete example of innovation within an established specialism.

    A useful vision does not require every lighting company to build a universal platform. It can involve doing a demanding application exceptionally well and making the customer’s work easier.

    The private companies complicate the story of decline

    Europe’s lighting industry cannot be understood through a few listed groups alone. Privately owned manufacturers and design businesses reveal different investment choices. Their financial disclosure is often less extensive, so historical scale and current operational developments need to be distinguished.

    TRILUX is a substantial example. DDW lists 2023 revenue of approximately €696.4m, a historical scale reference rather than a current audited performance assessment. More tangible recent evidence comes from the company’s investment programme: a Polish production and development site opened in September 2024 with approximately €32m invested and designed capacity of up to one million luminaires annually. [10] [11]

    In July 2026, TRILUX announced more than €80m of investment over three years at Arnsberg, covering its headquarters and production modernisation. Ansorg and Oktalite had also been brought together within TRILUX Retail. These are identifiable commitments of capital and organisational effort. Their value will depend on utilisation, development efficiency and customer demand, but they make a blanket accusation of industry inactivity difficult to sustain. [12] [13]

    SLV Lighting Group is pursuing integration across a different portfolio. Its predecessor, nnuks, reported turnover above €230m in 2021. That figure establishes historical group scale; it is neither current revenue nor the turnover of the SLV brand alone. [14]

    The group’s 2025 sustainability report describes five brands—SLV, Nordtronic, Novalux, unex lighting and Knightsbridge—and measures to share procurement, logistics and sales capabilities. Nordtronic and SLV are centralising purchasing and logistics, while SLV supports Novalux’s expansion beyond Italy. Knightsbridge also participates in wiring accessories. [15]

    The strategic opportunity is to make a multi-brand group more useful to installers and distributors through availability, range and service. Public disclosure does not yet allow those changes to be translated into a reliable assessment of recent group profitability.

    ERCO demonstrates the importance of application-specific product development. Its 2026 introductions include flexible linear track lighting for offices, further wallwashing applications and developments for display lighting. Those improvements address identifiable design and use requirements. [16]

    Its scale should nevertheless be described cautiously. A business index lists approximately €81.8m for ERCO GmbH in 2024, without sufficiently clarifying the consolidation boundary. The available evidence does not confirm current global brand revenue above €100m. ERCO belongs in the discussion for its professional significance, rather than an assumed revenue threshold. [17]

    FLOS combines an active design programme with the financial complexity of a wider luxury-design group. An Italian company database lists approximately €134.2m of 2024 revenue for FLOS S.p.A.; this is a secondary summary of a legal entity’s accounts, not verified global consolidated FLOS-brand turnover. Product launches continued through the 2025 and 2026 Milan design weeks. [18] [19]

    At Flos B&B Italia Group, the first-half 2026 continuing-business pro forma figures, excluding Louis Poulsen and Fendi Casa, show revenue of €270.2m, down 6.5%, and adjusted EBITDA of €50.1m, down 17.5%. The 18.5% EBITDA margin is a group measure encompassing furniture and other design activities; it must not be attributed to FLOS lighting alone. [20]

    The agreement to sell Louis Poulsen illustrates how ownership and financing influence even highly regarded brands. Announced in June 2026, the transaction was expected to close in the second half, subject to approvals. A disposal can support debt reduction and a new ownership horizon; it does not, by itself, establish that the brand has failed. [21]

    EGLO adds the mass-market decorative-lighting perspective. Its official company profile reports €523m of revenue for 2024 across a portfolio extending beyond lighting alone. Comparable profit and cash-flow figures are not supplied alongside that disclosure. Scale is clear; the quality of recent returns is less visible. [22]

    Specialisation and controls still offer room to grow

    Glamox’s holding company, GLX Holding, reported preliminary 2025 revenue and other operating income of NOK4.447bn, down 0.9%, with adjusted EBITA of NOK680m and a 15.3% margin. Orders increased by 4.9%, while operating cash flow declined from NOK691m to NOK497m. These different movements show why orders, earnings and cash need to be considered together. [23]

    Schréder, whose 2023 turnover was reported at €560m by EY, is extending its outdoor-lighting position through the acquisition of NLS Lighting, announced in April 2026. Local manufacturing and project access in North America provide a plausible complement to its technical capabilities. The transaction price was not disclosed. [24] [25]

    Plejd is a useful counterexample to the assumption that lighting-related markets offer little growth. Its 2025 net sales reached SEK935m, up 41.1%, with an EBIT margin of 24.6%. Management described the growth as organic and identified contributions from adjacent smart products and international expansion. It should therefore be understood as growth in a broader control and installation proposition, not simply stronger demand for luminaires. [26]

    Dexelance’s lighting activities also grew in 2025, reaching €34.3m from €32.1m. This is a smaller segment within a broader design group, but it reinforces the need to examine individual markets rather than assume uniform contraction. [27]

    Turnarounds need equally careful interpretation. Edison’s company-commissioned research on Dialight reports higher group underlying operating profit for the year to March 2026 despite lower revenue. However, lighting-segment revenue and underlying profit before central costs both declined. Improvement elsewhere in a group, or lower overheads, should not automatically be presented as a recovery in lighting demand. [28]

    LEDVANCE and Inventronics: ownership does not remove the European operating challenge

    Europe’s lighting ecosystem includes businesses with international ownership, engineering teams, manufacturing and customers. Their strategic significance rests on what they deliver in European markets.

    LEDVANCE retains substantial brand recognition, distribution relationships and local operating capabilities. Its parent’s product-line disclosure reports 2025 revenue of RMB9.25bn and a gross margin of approximately 40%. These are worldwide product figures reported in the parent’s currency, not European regional revenue or a standalone operating margin. [29]

    The first half of 2026 illustrates the importance of that distinction. LEDVANCE product-line revenue was RMB4.326bn, down 1.12%, while its gross margin fell to 39.82%, a decline of 2.80 percentage points. Gross profit decreased by approximately RMB142m. The parent group’s profit recovery therefore cannot establish a recovery in LEDVANCE’s lighting operations. Separate product-line net profit and cash flow were not disclosed. [30]

    Large acquisition-related impairments in the parent’s 2025 accounts also require care: a reduction in the carrying value of an acquisition-related asset group is not an equivalent amount of annual operating loss at LEDVANCE GmbH.

    For European customers, the more immediate questions concern product development, service and project execution. The acquisition of loblicht adds professional project capabilities. LEDVANCE’s August 2026 management announcement emphasised European B2B and project activity, alongside more efficient customer processes. [31]

    Its renewables range raises a further strategic question. Lighting, photovoltaics, inverters and storage can share some channels and customers, but commercial synergies need evidence. Public product availability does not establish material revenue or acceptable returns. [32]

    Inventronics faces a related task following its acquisition of the former ams OSRAM digital-systems business in Europe and Asia. The acquisition brought engineering, products and customer relationships, but those assets still have to earn their returns. Its subsequent transition from licensed OSRAM branding to Inventronics increases the importance of its own product reputation and service continuity. [38] [38] [38]

    For both businesses, the European test is practical: customer retention, competitive technical performance, reliable availability and profitable execution. Ownership changes and portfolio expansion can support those outcomes; they cannot substitute for them.

    IKEA and Kingfisher: the customer relationship is already broader than lighting

    The industry’s future competitors need not begin as specialist luminaire manufacturers. Home-furnishing and home-improvement businesses can place lighting inside a purchase journey customers already understand.

    IKEA reported worldwide retail sales of €44.6bn in FY2025, down approximately 1%, while volumes and customer numbers increased by around 3% following price reductions. These figures cover the whole IKEA retail system, including non-lighting activities; they say nothing directly about lighting profitability. [33]

    More significant for lighting strategy was IKEA’s November 2025 announcement of 21 Matter-compatible smart-home products, including 11 KAJPLATS bulbs, sensors and remotes. Its proposition brings connected lighting into an accessible home-furnishing context. [34]

    The competitive implication is an inference from that offer: a retailer that helps people choose, install and use a system can become the brand associated with the experience, while individual device suppliers become less visible. Product launches alone do not establish that IKEA has achieved this at scale or profitably.

    Kingfisher offers another view of channel influence. In the year ended 31 January 2026, group sales were £12.945bn and adjusted pre-tax profit £560m. B&Q sales reached £3.971bn, with like-for-like growth of 3.3%. Own exclusive brands represented 43% of group sales across categories, including ranges such as GoodHome and LAP. That percentage is not a lighting-market share. [35] [36]

    The next quarter was less favourable for B&Q: sales fell 3% as reported and 4.1% like for like, although e-commerce grew. Channel ownership does not eliminate exposure to household spending and renovation cycles. [37]

    Neither IKEA nor Kingfisher provides enough separate lighting information here to compare its lighting profitability with manufacturers. Their strategic relevance is nevertheless clear: they influence assortment, price, convenience and the customer relationship. Lighting brands need to demonstrate what additional value they bring within that environment.

    Leadership requires a commitment that customers can recognise

    The evidence does not support a claim that European lighting companies have stopped innovating. TRILUX’s investments, ERCO’s application work, F.W. Thorpe’s systems and service, and Plejd’s expansion all provide concrete counterexamples.

    The sharper concern is whether those efforts are sufficient, sustained and commercially effective. Research expenditure alone cannot answer this. Companies differ in their development cycles, accounting policies and mix of software, electronics and optical engineering.

    A credible vision should identify the customer problem, the resources committed and the conditions that will determine success. For a building owner, that might mean lower lifecycle cost and more dependable maintenance. For an installer, less commissioning time and fewer callbacks. For a specifier, better visual performance and clearer integration choices. For a household, an intuitive system that continues to work as devices change.

    Claims about wellbeing should be tied to measured lighting conditions and appropriate evidence. A controllable spectrum or a new product label does not establish a health outcome. Professional credibility depends on communicating what has actually been demonstrated.

    Boards also need to examine what restructuring preserves. Repeatedly reducing application engineering, software support and customer knowledge may protect current earnings while weakening the next product generation. Long-term projects require milestones and accountability, but they also require continuity.

    Europe’s strongest opportunity is to connect its existing expertise with the realities of occupied buildings. That involves partnerships with electrical, automation and building-service businesses; clearer responsibility for commissioning and maintenance; and products designed to remain useful within evolving systems.

    Traditional lighting manufacturers still have substantial advantages in optical performance, specification and application knowledge. New entrants have their own execution gaps. The eventual outcome is open.

    What should concern established leaders is the possibility of remaining technically capable while becoming commercially secondary—supplying devices into systems whose customer relationships and service revenues belong to someone else.

    The next generation of European lighting leadership will be earned through products and services that people can recognise as better, supported by investment that produces durable returns. The question for today’s leaders is whether their current decisions are building that future.

    Sources and reading notes

    The references distinguish company financial reports, product announcements and secondary scale estimates. Product and investment announcements establish actions or intentions, not proven financial returns. Figures retain their original currencies and reporting periods; group, brand, legal-entity and product-line disclosures are not interchangeable.

    For readers using a platform that does not support external links, copy the full address below into a browser. Some financial-report links open PDFs; long addresses should be copied in full.

    [1] EU Energy Performance of Buildings Directive
    Regulatory context for technical building systems; implementation and scope depend on the relevant provisions.
    https://eur-lex.europa.eu/eli/dir/2024/1275/oj

    [2] Signify reporting and announcements
    Company reporting archive; annual results supply the historical group figures.
    https://www.signify.com/global/our-company/news/press-releases

    [3] Signify: CEO appointment
    Background and timing of As Tempelman’s appointment.
    https://www.signify.com/global/our-company/news/press-releases/2025/20250528-signify-names-as-tempelman-as-chief-executive-officer

    [4] Zumtobel Group corporate information
    Company reporting and announcements; group and segment measures must be distinguished.
    https://z.lighting/en/group/investor-relations/

    [5] Zumtobel: Heiner Lang appointment
    Board entry and planned CEO succession dates.
    https://z.lighting/en-gb/group/news-insights/ir/supervisory-board-appoints-heiner-lang-ceo-zumtobel-group/

    [6] Zumtobel Q1 FY2026/27 results
    Quarterly figures preceding the incoming CEO’s tenure.
    https://z.lighting/documents/4085/Zumtobel_Group_-Press_releases-_Q1_2026-27.pdf

    [7] Fagerhult investor information
    Annual reporting, portfolio and acquisition information.
    https://www.fagerhultgroup.com/investors/

    [8] Luceco investor information
    Group reporting includes electrical products beyond lighting.
    https://www.lucecoplc.com/investors/

    [9] F.W. Thorpe annual report 2025
    Financial results, SmartScan and operating model.
    https://www.fwthorpe.co.uk/pdf/fw-thorpe-annual-report-2025.pdf

    [10] TRILUX company profile, DDW
    Secondary historical revenue estimate for 2023.
    https://die-deutsche-wirtschaft.de/unternehmen/trilux-gmbh-co-kg-arnsberg/

    [11] TRILUX sustainability report 2023/24
    Polish facility investment and capacity; pages 36–37.
    https://www.trilux.com/fileadmin/Downloads/Documents/Nachhaltigkeit/Sustainability_Report_2023-2024.pdf

    [12] TRILUX Arnsberg investment announcement
    Planned investment over three years, announced July 2026.
    https://www.trilux.com/de/blog/neubau-standort-arnsberg/

    [13] TRILUX Retail integration
    Brand and organisational changes.
    https://www.trilux.com/ch/blog/trilux-retail-migration/

    [14] nnuks sustainability report 2022
    Historical 2021 multi-brand group turnover.
    https://slv-lighting-group.com/wp-content/uploads/2022/06/NKS_BRO_Sustainability-2022_210x279.pdf

    [15] SLV Lighting Group sustainability report 2025
    Brand portfolio and procurement, logistics and sales integration; pages 8–11.
    https://a.storyblok.com/f/113144/x/f85bebdba1/slg_bro_sustainability-2025_210x279mm_72dpi.pdf

    [16] ERCO new products
    Application and product information; not financial evidence.
    https://www.erco.com/en/products/new-products/

    [17] ERCO business-index profile
    Secondary legal-entity figure with an unclear consolidation boundary.
    https://www.weltmarktfuehrerindex.de/profil/erco

    [18] FLOS S.p.A. company-account summary
    Secondary transcription of legal-entity accounts, not global brand revenue.
    https://www.reportaziende.it/flos_societa_per_azioni_bs_00290820174

    [19] FLOS at Milan Design Week 2026
    Product-development evidence.
    https://flos.com/en/wo/flos-at-milano-design-week-2026.html

    [20] Flos B&B Italia Group H1 2026 presentation
    Continuing-business pro forma results, pages 5 and 12; includes non-lighting businesses.
    https://www.flosbebitaliagroup.com/on/demandware.static/-/Library-Sites-DHCorp-contentlib/default/dw8ee7cc40/Investors/Reports%20and%20publications/1_presentation_Flos%20B%26B%20Italia%20S.p.A.%20-%20H1%202026_last.pdf

    [21] Louis Poulsen transaction: buyer’s adviser
    Announced transaction subject to completion conditions.
    https://accura.dk/en/cases/chr-augustinus-fabrikker-acquires-louis-poulsen/

    [22] EGLO official company profile
    Self-reported 2024 scale; no matching profit or cash-flow disclosure.
    https://lu.linkedin.com/company/eglo-leuchten-gmbh

    [23] GLX Holding preliminary 2025 results
    Holding-company reporting scope and preliminary results.
    https://www.glamox.com/news-and-stories/glx-holding-as-the-holding-company-of-glamox-closes-2025-with-improved-profitability-and-robust-performance/

    [24] EY profile of Schréder
    Historical 2023 turnover, published December 2024.
    https://www.ey.com/en_be/newsroom/2024/12/schreder-named-l-entreprise-de-l-annee-2024

    [25] Schréder acquisition of NLS Lighting
    Announced April 2026; price not disclosed.
    https://www.schreder.com/en/news/schreder-announces-acquisition-nls-lighting

    [26] Plejd year-end report 2025
    Reported growth, profitability and management explanation of organic expansion.
    https://news.cision.com/plejd/r/year-end-report-2025,c4296913

    [27] Dexelance investor presentation, April 2026
    Lighting-segment revenue, page 25.
    https://dexelance.com/wp-content/uploads/Investor-Presentation-DEXELANCE_v.-08.04.2026-FINAL-1.pdf

    [28] Edison research on Dialight
    Company-commissioned external research; group and lighting-segment results on pages 3–4.
    https://static.lse.co.uk/research/download/3653.pdf

    [29] MLS annual report 2025
    Listed parent’s product-line and acquisition-accounting disclosures, in Chinese.
    https://money.finance.sina.com.cn/corp/view/vCB_AllBulletinDetail.php?id=12234150&stockid=002745

    [30] MLS interim report 2026
    Product-line gross profit and consolidated group results, in Chinese.
    https://money.finance.sina.com.cn/corp/view/vCB_AllBulletinDetail.php?id=12563625&stockid=002745

    [31] LEDVANCE management announcement, August 2026
    Management responsibilities and European operating priorities.
    https://www.ledvance.com/en-uk/company/press/press-releases/2026/ledvance-strengthens-its-management-team-with-dr-markus-emmert-n479050

    [32] LEDVANCE Renewables announcement
    Product range and stated strategy, not separate financial results.
    https://www.ledvance.com/en-int/company/press/press-releases/2024/ledvance-introduces-ledvance-renewables–photovoltaics-for-a-brighter–greener-future-n303994

    [33] IKEA FY2025 retail sales
    Worldwide retail-system figures, not lighting-segment results.
    https://www.ikea.com/global/en/newsroom/corporate/ikea-retail-sales-fy25-251016/

    [34] IKEA smart-home product announcement
    November 2025 Matter-compatible range.
    https://www.ikea.com/global/en/newsroom/retail/the-new-smart-home-from-ikea-matter-compatible-251106/

    [35] Kingfisher annual report 2025/26
    Group and B&Q financial results; fiscal year ended January 2026.
    https://www.kingfisher.com/~/media/Files/K/Kingfisher-Plc/Universal/investors/result-reports-presentation/2026/2526-annual-report-and-accounts.pdf

    [36] Kingfisher own exclusive brands
    43% relates to group sales across categories, not lighting alone.
    https://www.kingfisher.com/our-banners-and-brands/own-exclusive-brands

    [37] Kingfisher Q1 2026/27 update
    Quarter ended April 2026; separate period from annual results.
    https://www.kingfisher.com/~/media/Files/K/Kingfisher-Plc/Universal/investors/result-reports-presentation/2026/2026-27-q1-trading-update.pdf

    [38] Inventronics annual reporting and acquisition information
    Company disclosures concerning acquired operations and subsequent performance; source in Chinese.
    https://cn.inventronics-co.com/news_info/33/1771.html

    [39] Signify strategy announcement, June 2026
    Medium-term growth, profitability and cash-flow targets are management objectives, not reported outcomes.
    https://www.signify.com/global/our-company/news/press-releases/2026/20260623-signify-introduces-strategy-to-create-a-more-focused-better-performing-company

  • 把光说清楚 13|健康照明/综合照明基础十八讲

    “蓝光”是风险、节律信号,还是营销话术?

    同一个词背后,其实有三套完全不同的问题

    作者|林纪良 Lawrence Lin

    GLGA 主席|GLG 董事会成员|IWBI WELL Light Concept Advisor|LRS 创始人兼 CEO

    消费者拿着“防蓝光”灯具问我:“既然蓝光有害,白天为什么又要提高 melanopic 刺激?”这不是自相矛盾,而是行业长期把三个概念都叫作“蓝光”。

    蓝光危害、昼夜节律相关刺激与屏幕视觉疲劳,需要分别讨论。波长区间可能重叠,作用机制、剂量、评价方法和风险语境却不同。


    蓝光危害:讨论视网膜光化学损伤

    CIE 所说的 blue-light hazard,特指光化学性视网膜损伤风险,采用相应危害加权函数和辐亮度/辐照度评价。它不等同于睡眠影响,也不等同于“看屏幕会累”。

    在可预见的正常使用条件下,白光普通照明通常不会构成蓝光危害。

    高强度特殊光源、近距离观察或特定工业环境仍需按 IEC 62471 等要求评估,不能用上述结论一概排除。


    节律相关刺激:讨论时间与暴露

    黑视素通路对短波可见光较敏感,但应使用 CIE S 026 的 melanopic 量描述,而不是笼统说“蓝光多”。

    白天适当的光暴露与夜晚降低暴露,是时间策略;它不能直接用蓝光危害等级代替。

    同样,夜间减少屏幕影响,不只是给屏幕加一层黄色。亮度、观看距离、持续时长、内容引发的心理唤醒,以及整个房间的光都重要。


    视觉疲劳:往往不是一条波段的问题

    干眼、眨眼减少、字体过小、反射眩光、近距离用眼过久和姿势,都可能造成不适。

    把所有疲劳归咎于蓝光,容易让真正有效的改善措施被忽略。

    一个负责任的“低蓝光”产品,应说明降低的是哪一段光谱、牺牲了什么颜色表现、适用于哪个时段,以及依据的测试方法。


    目前可以说/还不能说

    目前可以说: 蓝光危害有特定安全定义;melanopic 刺激有独立计量;视觉疲劳是多因素问题。

    还不能说: 普通白光照明中的蓝光必然损伤视网膜,或“去蓝光”就能解决睡眠与眼疲劳。


    今天就能做的三件事

    • 听到“蓝光”时,先问讨论的是光生物安全、节律,还是视觉舒适。
    • 特殊高强度光源按 IEC 62471 系列做风险分组,不用营销标签替代。
    • 晚间优先降低整体亮度和暴露时长,再优化光谱。

    证据标签:已有共识。
    三类问题应分开计量与沟通。


    参考资料

    • CIE Position Statement on Blue Light Hazard :https://cie.co.at/publications/position-statement-blue-light-hazard-april-23-2019
    • IEC 62471-7:2023 :https://webstore.iec.ch/en/publication/68810
    • CIE S 026:2018 :https://www.cie.co.at/publications/cie-system-metrology-optical-radiation-iprgc-influenced-responses-light-0

    下一篇,我们来看另一个常被一句“无频闪”带过的问题:看不见的闪烁,为什么仍可能影响照明质量?

  • 把光说清楚 12|健康照明/综合照明基础十八讲

    全光谱不等于健康,色温也不是药方

    让光谱回到可测量的特征,不再承担过度承诺

    作者|林纪良 Lawrence Lin

    GLGA 主席|GLG 董事会成员|IWBI WELL Light Concept Advisor|LRS 创始人兼 CEO

    “我们这款灯是全光谱,所以更护眼、更助眠、更接近日光。”这类介绍很常见。全光谱听起来完整、自然,也因此很容易承载超出证据的想象。

    “全光谱”目前在市场传播中并不是一个自动对应健康结果的统一处方。评价光谱,应回到具体指标:色彩还原、色域、特定波段分布、mel-DER,以及不同运行状态下的整体表现。


    连续,不等于适合所有时段

    一条看起来连续平滑的光谱,可能带来良好色彩体验;但是否适合上午办公室、晚间住宅或博物馆展陈,仍取决于数量、方向、时间和对象。

    日光本身也不是一條固定曲線,它會隨天氣、時刻、朝向和天空條件而改變。

    “像日光”若没有指定比较条件,就很难成为严谨结论。更何况,夜间临睡前的目标并不是复制正午日光,而是降低不必要的光暴露。


    CCT 不能替代光谱

    两款 3000 K 光源可以有不同的颜色保真度、色域和 mel-DER。

    相反,一款 4000 K 产品经过合理调暗,眼睛接收的 mel-EDI 可能低于一款没有调暗的 2700 K 产品。

    色温会影响色貌与氛围,但不是生理剂量。

    颜色质量也不宜只看一般显色指数 Ra。CIE 已建议在过渡期同时报告 CIE Rf 与 Ra;若项目关心色彩偏好和鲜艳度,还需要更完整的色域与色相信息。


    产品比较应该问什么

    索取机器可读的光谱数据,而不只是图片;

    确认数据对应的功率、色温和调光档位;

    查看颜色保真、色域、mel-DER、效率和时间光调制是否同时可接受。

    若供应商声称改善睡眠或认知,还要问人体证据的对象、场景和时长。

    真正专业的产品,不怕把边界写清楚。


    目前可以说/还不能说

    目前可以说: 光谱形状会影响色彩表现和 α-opic 刺激;完整光谱数据比“全光谱”标签更有工程价值。

    还不能说: 只要光谱连续、CCT 接近日光或 Ra 很高,就必然护眼、助眠或适合全天使用。


    今天就能做的三件事

    • 把“全光谱”改写成可验证的光谱、颜色和 α-opic 指标。
    • 比较调光调色产品时,检查每个关键场景,而不只检查额定状态。
    • 面向消费者时,把“呈现自然、颜色真实”和“医学健康效果”分开表达。

    证据标签:已有共识/开放问题。
    光谱可被准确计量;单一市场标签与长期健康结局之间没有自动等号。


    参考资料

    • CIE PS 002:2025 :https://www.cie.co.at/publications/cie-ps-0022025-cie-position-statement-colour-quality-metrics-2nd-edition
    • CIE S 026:2018 :https://www.cie.co.at/publications/cie-system-metrology-optical-radiation-iprgc-influenced-responses-light-0
    • CIE 253:2024 — Technical Reports :https://cie.co.at/publications/technical-reports

    下一篇,我们继续拆一个更容易引发焦虑的词:蓝光到底是风险、节律信号,还是营销话术?

  • 把光说清楚 11|健康照明/综合照明基础十八讲

    综合照明,首先必须是好照明

    没有视觉质量,所有健康目标都站不稳

    作者|林纪良 Lawrence Lin

    GLGA 主席|GLG 董事会成员|IWBI WELL Light Concept Advisor|LRS 创始人兼 CEO

    某辦公室為了提高眼睛處的光暴露,在員工正前方增加了一塊很亮的發光面。測量數值漂亮了,員工卻開始戴帽子、關燈,甚至用紙板遮擋。設計達到了計算值,卻失去了使用者。

    综合照明不是在传统照明之上再加一个数字。它首先要满足可见性、舒适、安全与空间品质,然后才谈适时的非视觉刺激。一个让人主动逃避的方案,很难长期产生预期效果。


    好照明有几条不能丢的底线

    照度要与任务相符,分布不能让眼睛频繁在极亮与极暗之间适应;眩光要受控,屏幕与光泽表面不能产生干扰反射;显色应支持辨识人物、材料和警示信息;时间光调制不能制造明显闪烁或频闪效应。

    此外,空间需要有层次。均匀不等于把每个表面照成同样亮,动态也不等于每十分钟改变一次色温。人的注意、方向感与环境氛围,往往来自有秩序的亮度关系。


    指标之间需要平衡

    提高垂直照度可能增加眩光;提高墙面亮度可能增加能耗;改变光谱可能影响显色和系统效率;过度调光又可能放大某些驱动器的时间光调制。

    工程设计的价值,正是在这些约束中寻找整体最优,而非追逐单项冠军。

    这也是 CIE 所说“proper light at the proper time”的完整含义:正确的光,不只有数量和时刻,也包括质量与使用环境。


    使用者行为是最终裁判之一

    如果用户频繁拉帘、关闭自动控制、遮挡灯具,首先要了解原因。

    眩光、温度、隐私、屏幕反射或控制逻辑都可能让设计意图失效。回访不是软性加分项,而是验证系统是否真正工作的证据。


    目前可以说/还不能说

    目前可以说: 综合照明应同时满足视觉舒适、任务表现、安全、节律相关目标、能源与建筑条件。

    还不能说: 为达到一个 melanopic 数值,可以合理牺牲眩光、显色、闪烁控制或使用者自主性。


    今天就能做的三件事

    • 建立包含照度、眩光、显色、时间光调制、控制与 mel-EDI 的联合检查表。
    • 样板测试时让真实使用者坐、看、操作,而不只让仪器读数。
    • 验收后安排回访,观察遮灯、关灯与拉帘等“反设计行为”。

    证据标签:已有共识。
    综合照明的前提,是满足整体照明质量。


    参考资料

    • CIE PS 001:2024: https://cie.co.at/publications/cie-position-statement-integrative-lighting-recommending-proper-light-proper-time-3rd
    • ISO/CIE 8995-1:2025: https://www.iso.org/standard/76342.html
    • GB/T 50034—2024 Publication Information: https://sczjjgfw.gov.cn/clas/wjhb/jsb/24/jsb202433.html

    下一篇,我们处理市场上最响亮的词之一:全光谱为什么不自动等于健康,色温又为什么不是药方?

  • 把光说清楚 10|健康照明/综合照明基础十八讲

    桌面 500 lx,为什么不等于眼睛收到 500 lx?

    从水平照度走向人的视线,空间才真正进入计算

    作者|林纪良 Lawrence Lin

    GLGA 主席|GLG 董事会成员|IWBI WELL Light Concept Advisor|LRS 创始人兼 CEO

    竣工验收时,工程师把照度计平放在桌面,读数 512 lx,大家松了一口气。可坐下来以后,使用者面对的是暗墙、亮窗和屏幕反光。桌面数字合格,并不代表人的视觉体验与眼睛光暴露都合格。

    水平照度是工作面评价的重要依据;眼睛位置的垂直照度和 mel-EDI,则描述另一个几何方向。它们可能相关,却不能相互代替。


    光到哪里,取决于配光与表面

    窄光束下照灯可以把大量光集中到桌面,但较少进入人的前方视野。大面积发光面、明亮墙面或侧窗,则可能提高眼睛方向的照度。墙顶地的反射率、家具高度、隔断和窗帘状态,都会改变最终结果。

    因此,同样 500 lx 的桌面照度,可以对应完全不同的垂直照度、亮度分布和眩光风险。设计软件里若只建立水平计算面,很难提前看见这些差异。


    眼睛测点应该怎样定义

    办公空间常以坐姿眼睛高度设置垂直测点,并按主要视线方向计算或测量;站立、教室、病房和交通空间则应根据实际姿态调整。若人员朝向不固定,可选择多个代表方向,或评估最不利与典型情况。

    测 mel-EDI 时,传感器必须具有适合的光谱响应,且保持垂直方向。用普通照度计读数再凭色温估算,可能带来不可控误差。现场还要记录日光、窗帘、灯具调光和测量时间。


    从图纸到现场的一条线

    设计阶段,先在模型中建立水平工作面与眼睛垂直面;

    样板阶段,用光谱仪在预定眼位复核;

    调试阶段,检查白天、傍晚和夜间场景;

    验收阶段,使用同一测点清单重复测量。

    如果四个阶段各自使用不同位置和条件,数字再精确,也无法形成证据链。


    目前可以说/还不能说

    目前可以说: 桌面水平照度主要服务视觉任务;眼睛位置垂直测量更适合描述人的视线光暴露,两者应并行评估。

    还不能说: 水平 500 lx 必然对应某个固定 mel-EDI,或只要垂直照度高就一定舒适。


    今天就能做的三件事

    • 图纸上同时标出工作面和代表性眼位测点。
    • 现场测量记录方向、时间、窗帘、日光与调光状态。
    • 把眩光、亮度分布与垂直光暴露放在同一场景里审查。

    证据标签:已有共识。
    测量几何是结果的一部分,不能省略。


    参考资料

    • CIE S 026:2018:https://www.cie.co.at/publications/cie-system-metrology-optical-radiation-iprgc-influenced-responses-light-0
    • Brown et al., 2022:https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3001571
    • ISO/CIE 8995-1:2025:https://www.iso.org/standard/76342.html

    下一篇,我们暂时离开新指标,回到最朴素的原则:综合照明,首先必须是好照明。

  • 2026 Second Forum on New Quality Productive Forces, Technological Innovation and Development in Lighting

    Artificial Electric Light Has Come a Long Way in Nearly 150 Years—How Do We Break Through the Ceiling of the Lighting Industry?

    林纪良
    Founder, Lighting Recipe Studio (LRS)
    Chairman, Good Light Group Asia (GLGA)

    September 3, Nanchang.

    At the 2026 Second Forum on New Quality Productive Forces, Technological Innovation and Development in Lighting, Lawrence delivered a morning presentation titled “Beyond Talking Past One Another in Healthy Lighting — The Industry Significance and Implementation Pathway of CIE TN 016:2026.”

    In the afternoon, Lawrence joined a roundtable discussion on “Green Transformation and Technological Innovation Pathways for the Lighting Industry under the Dual-Carbon Goals.”

    One event, two seemingly different themes: one focused on health, the other on carbon reduction.

    But they ultimately ask the same fundamental question: What problems does the lighting industry still need to solve today—and how can we work together to break through the industry’s ceiling?


    CIE TN 016 Is Just One Point of Entry

    The morning presentation began with CIE TN 016:2026.

    This document is not a new “healthy lighting certification standard,” nor does it define what types of luminaires can be called health-oriented products. Instead, it addresses a more fundamental—and long-overlooked—question:

    When we use light to study its effects on human beings, what exactly are we recording?

    Take two light sources that both provide 500 lx at 4000 K. Their actual outcomes may still differ because of variations in spectral power distribution, eye-level direction, exposure intensity and duration, prior light exposure, and the physiological state of the participants.

    If these conditions are not fully documented, studies become difficult to compare and results difficult to reproduce. When research findings are translated into standards, products, and real-world spaces, they can easily be reduced to a few isolated parameters—and may ultimately become a situation where “everyone is speaking their own language.”

    What CIE TN 016 is really advancing, therefore, is a common language of evidence.

    But this is not the end of the journey.

    There is still a long engineering chain to connect: from laboratory data to an LED chip, from the chip to the luminaire, from the luminaire to the space, and ultimately from the space to the light reaching the human eye.

    CIE TN 016 is only a point of entry. The real question for our industry is how to create a closed loop connecting scientific research, standards, spectral design, control systems, spatial design, and on-site validation.


    Luminous Efficacy Has Improved, Yet the Industry’s Ceiling Remains

    The afternoon roundtable was moderated by Wang Xuhua, Vice Chairman of the China Lighting Electrical Appliances Association.

    The roundtable focused on the dual-carbon goals, but Lawrence raised a point during the discussion: we cannot define the dual-carbon agenda simply as continuing to increase LED chip efficacy, nor can we equate green transformation with replacing a generation of old luminaires with newer, more energy-efficient ones.

    Over the past several decades, LEDs have driven a remarkable revolution in light sources.

    From incandescent and fluorescent lamps to semiconductor lighting, we have continuously improved luminous efficacy, reduced power consumption, and extended service life. Today, the luminous efficacy of an LED can far exceed that of traditional light sources.

    But improving product efficiency does not necessarily mean improving the efficiency of a building’s lighting system.

    A highly efficient luminaire does not mean it is switched on at the right time. And integrating a smart control system does not necessarily mean that its control logic truly understands whether people are present, what they are doing, or what kind of light they actually need at that moment.

    Likewise, energy efficiency is not simply about switching off more lights or dimming them further.

    True energy efficiency means providing the right amount of light—neither insufficient nor excessive—to people engaged in specific activities, at the right place and at the right time.

    This is the shift from “luminous efficacy” to “system-level performance,” and it is the next ceiling that the lighting industry needs to break through.

    Nearly 150 Years of Artificial Electric Light: We Are Still Learning How to Use Light

    Modern artificial electric light has been with us for nearly 150 years.

    It is not that we did not understand that light is connected to people. Rather, for much of that time, we lacked the fundamental conditions and engineering capabilities needed to truly connect these relationships.

    We could not readily change spectral characteristics in real time. Sensors, digital communications, and computing platforms were either unavailable or too costly. Products, buildings, controls, and human research each spoke their own technical language. Even though we understood that natural light changes throughout the day, it was difficult to make artificial lighting dynamically respond to those changes within real buildings.

    As a result, traditional lighting developed its evaluation systems around the “lamp”:

    How many lumens?
    How many watts?
    What is the luminous efficacy?
    What is the illuminance?
    What is the color temperature?

    All of these parameters are important. But they are not enough to answer another, more fundamental question:

    What, ultimately, is the light that reaches the human being?

    Today, the conditions are changing.

    Semiconductor lighting has made spectrum, intensity, and temporal patterns increasingly controllable. Sensors allow us to perceive the environment and human activity. AIoT enables devices, spaces, and cloud platforms to connect. Digital twins and data analytics give lighting systems the potential to continuously learn and optimize.

    For the first time, we have a real opportunity to connect five dimensions:

    Light. People. Space. Time. Activity.

    These are not five independent labels.

    Where a person is, at what time, and what they are doing determines what kind of light they need. And after light passes through luminaires, building surfaces, and the surrounding space, the actual exposure that ultimately reaches the eyes determines the real visual, physiological, and behavioral experience.

    If any link is missing, “smart lighting” may become little more than connected devices; “healthy lighting” may become little more than a collection of product specifications.


    Dual-Carbon and Health Are Not Two Separate Paths

    The dual-carbon agenda asks us to reduce waste. Health asks us to become more precise.

    On the surface, one is about energy and the other about people. In reality, both point toward the same system capability:

    Delivering good light when and where it is needed.

    A good lighting environment is not necessarily one that is brighter at all times. Nor does it mean maximizing mel-EDI, color temperature, or any single spectral metric.

    During the day, people may need sufficient visual illumination together with appropriate circadian stimulation. In the evening and at night, systems should reduce unnecessary light exposure. In unoccupied areas, lighting should respond accordingly. And across different scenarios—precision work, rest, communication, or care—the light should adapt to the activity.

    When light is delivered precisely to where it is needed and at the time it is needed, health and energy efficiency no longer have to be opposing objectives.

    Health moves lighting from “Is there light?”“Is the light appropriate?”

    The dual-carbon agenda pushes the industry from asking “How many lights have we installed?” to asking “Can we achieve better outcomes with fewer resources?”

    Together, these forces are driving lighting away from selling products and toward delivering system-level value.


    What We Truly Lack Is an Engineering Language

    Today, technology has already moved ahead. What constrains the industry is increasingly not a particular chip, material, or control protocol.

    What we need to solve is how to connect the entire chain:

    How does product data enter the design process?
    How is design intent communicated to the control system?
    How are control outcomes measured in real spaces?
    How is a person’s actual light exposure recorded?
    And how can health, comfort, energy consumption, and carbon emissions be validated through comparable methods?

    This requires an engineering language capable of connecting all stakeholders:

    From source SPD to luminaire photometry;
    from horizontal illuminance to actual eye-level exposure;
    from static parameters to temporal patterns;
    from device control to human activity;
    from design objectives to on-site validation;
    and ultimately, from one-time project delivery to continuous monitoring and optimization.

    Only when this chain of evidence is established can scientific research move beyond academic papers, standards move beyond written provisions, and smart controls move beyond demonstration projects.

    For businesses, this is also the foundation for a transformation in business models.

    In the future, lighting companies may deliver more than luminaires. They may deliver designed, commissioned, measured, and continuously optimized lighting environments.

    Competition will gradually shift away from individual product specifications toward verifiable outcomes in real spaces.


    The Ceiling Will Not Open by Itself

    At the roundtable, Lawrence called on industry leaders, researchers, designers, manufacturers, testing organizations, and control-platform providers to work together to break through the ceiling of the lighting industry.

    This is not a slogan.

    Lighting already has highly efficient light sources, intelligent controls, sensors, communication technologies, and artificial intelligence. But turning these capabilities into genuinely good light in buildings still requires us to build the standards, data, engineering, and validation systems that connect them.

    No single company can accomplish this alone. Nor should any one metric or any single standard attempt to do everything.

    We need to preserve the rigor of scientific research while understanding the realities of engineering. We must prevent health-related concepts from becoming the subject of excessive marketing, while also recognizing that imperfect evidence should not become an excuse to stop exploring and practicing.

    Modern artificial electric light has been with us for nearly 150 years.

    In the past, we focused primarily on solving the question of how to manufacture light.

    Today, we finally have the opportunity to answer a deeper question:

    How do we deliver the right light, to the right people and spaces, at the right time?

    This is the historic opportunity that semiconductor lighting and AIoT have given our generation of lighting professionals.

    Together, we should bridge the remaining gaps between research, standards, products, spaces, and validation—to break through the next ceiling of the lighting industry and bring truly healthy, comfortable, efficient, and sustainable light into the lives of billions of people.

    Perhaps this is the direction in which the “new quality productive forces” of lighting are most worth looking toward.