Over the past several years, across international forums, standards organizations, and corporate advisory projects, our CEO has consistently emphasized a core message: the next phase of healthy lighting is no longer about technology alone, but about real-world implementation.
The key driver of that implementation is neither manufacturers, laboratories, nor standards bodies, but designers working at the very front line of spatial decision-making.
Building on this belief, in December our CEO partnered with Yunzhiguang (云知光) to deliver the company’s first large-scale, systematized healthy lighting training program specifically for designers. Covering health-based lighting logic, standards verification, and the practical application of the Field Evaluation System (FES) for diagnosing lighting quality in real environments, the program brought together more than fifty designers on site—marking the opening of a new chapter for the industry.
Why Designers Are the Critical Force Behind the Realization of Healthy Lighting
Because every form of lighting that truly changes lived experience must ultimately pass through the hands of designers before it enters homes, hotels, offices, schools, healthcare facilities, and senior living communities.
No matter how advanced the technology, how rigorous the standards, or how refined the products may be, if the design process does not fully grasp the logic of light × people × space × time, healthy lighting will remain confined to presentation slides rather than built reality.
This is what made the course particularly compelling: for the first time, designers approached lighting from a health-first perspective, rather than evaluating it solely in terms of brightness, aesthetics, or cost.
FES: Grounding Every Design Decision in Real Spaces
During this training, the most discussed and widely appreciated tool was the In.Licht® FES (Field Evaluation System), developed by LRS as an on-site evaluation methodology.
Its strong resonance with designers stems from three long-standing pain points in lighting design practice:
- Laboratory data ≠ real-world experience
- Calculated drawings ≠ actual human light exposure
- Product specifications ≠ spatial health performance
The introduction of FES provided, for the first time, a practical and actionable response to these challenges.
Circadian impact of light
Metrics such as m-EDI, EML, and CS are no longer abstract parameters; they become measurable, adjustable, and verifiable behaviors within real spaces.
Visual comfort of light
Glare, uniformity, and task suitability are no longer judged solely by experience or intuition, but evaluated through on-site evidence.
Emotional and behavioral effects of light
Exposure levels across different zones, times, and user groups can be quantified, mapped, and compared, enabling more precise design decisions.
Integrated experience of light × air × environment
In.Licht® allows for the simultaneous assessment of lighting and air quality (PM2.5 / PM10, TVOC, CO₂), as well as temperature and humidity—elevating design thinking from a single lighting system to a holistic living scenario.
It is this three-dimensional view of health that prompted many designers to remark after the course:
“This was the first time I saw light truly relate to people.”
“I didn’t realize that the health of a space could actually be measured, designed, and improved.”
“FES allows us to say, ‘this is healthy,’ instead of ‘it should be good enough.’”
Training in Action: From Theory and Simulation to Real-World Diagnosis
During the training, participants engaged in in-depth discussions around key questions:
- How does light influence human alertness, sleep, emotions, and stress?
- Why are “seeing clearly, sleeping well, and feeling comfortable” the three essential elements of good lighting?
- How should lighting priorities be determined based on spatial tasks and user behavior?
- How can FES be used to establish a diagnostic workflow before design, during design, and after implementation?
When designers began conducting on-site measurements with In.Licht®—inside rooms, along corridors, and in front of façades—many were struck by several discoveries:
- In the same space, exposure levels vary dramatically from one position to another.
- Circadian illuminance does not necessarily come from the brightest luminaires.
- The factors that most strongly affect comfort are often spectrum and distribution, not wattage.
- Air quality shows a strong correlation with perceived lighting comfort.
By transforming subjective impressions into measurable evidence, FES replaces “it feels about right” with “the data shows”—marking a fundamental shift in the industry from experience-driven practice to science-based design.
Why is this training so significant?
Because this is the first time that human-centric lighting (HCL) has progressed from:
“Explaining concepts” → “Explaining methods” → “Explaining scene diagnostics” → “Hands-on tool practice”
This means:
📌 HCL is no longer just manufacturer marketing
📌 It is no longer just standard clauses
📌 It no longer stays only within academic models
Instead, it has truly entered the hands of designers, becoming a practical, implementable service.
Advantages of In.Licht®: Truly Designed for the Real Space
In class, designers most often discuss the unique value of In.Licht®:
1. All-in-One Integration
Spectra, circadian rhythm, flicker, illuminance, color temperature, and air quality—six key dimensions—all part of the real spatial experience.
2. Designed for Actual Space Scenarios
It’s not about “measuring the light,” but about “measuring the light people actually experience.”
3. More Than an Instrument—A Complete Methodology
FES is both a service system and a design language, turning data into actionable design capability.
4. Fully Aligned with International Standards
Circadian logic, flicker logic, and visual task logic from WELL, IES, and CIE can all be verified on-site.
A New Era of Human-Centric Lighting Requires Us to Move Forward Together
After this training, We are even more convinced:
The design industry of the future will be divided into two types of people—
🔹 Those who understand health
🔹 Those who still “only look at brightness”
In.Licht®’s mission is to empower more designers, developers, brands, and operations teams with the ability to “see what’s real”, enabling the creation of lighting environments that are more scientific, human-centered, and beautiful.
Closing Remarks
Thank you to all the designer partners who participated in this course. Your enthusiasm, curiosity, and professionalism have been truly inspiring.
Let’s work together to make light a sustainable, scalable service and create spaces that are genuinely human-centered.
Stop guessing light. Start measuring. Move beyond guesswork—use science to improve health.
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