{"id":2616,"date":"2026-01-13T07:42:19","date_gmt":"2026-01-13T07:42:19","guid":{"rendered":"https:\/\/lightingrecipe.com\/?page_id=2616"},"modified":"2026-01-21T06:53:14","modified_gmt":"2026-01-21T06:53:14","slug":"s-p-ratio-blue-hazard-ranking-eb-and-kbv","status":"publish","type":"page","link":"https:\/\/lightingrecipe.com\/de\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\/","title":{"rendered":"S\/P-Verh\u00e4ltnis, Blaulicht-Gef\u00e4hrdungseinstufung, Eb und Kbv"},"content":{"rendered":"<div class=\"wp-block-columns alignwide has-primary-color has-text-color has-link-color has-small-font-size wp-elements-d95f567f9031974c1c94d5e8adad5506 is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<p class=\"has-black-color has-text-color has-link-color wp-elements-07ecadd99d5a17227f95c09d9c5686fc\" style=\"font-size:15px\">Licht tritt durch die Hornhaut in das Auge ein und wird anschlie\u00dfend auf die Netzhaut fokussiert. Die Netzhaut enth\u00e4lt Millionen lichtempfindlicher Zellen, sogenannte Photorezeptoren, die in zwei Typen unterteilt sind: St\u00e4bchen und Zapfen.<br><br><strong>Skotopisches Sehen<\/strong><br><br>Skotopisches Sehen bezeichnet das Sehen bei sehr niedrigen Beleuchtungsst\u00e4rken, etwa bei Nacht. In solchen lichtarmen Umgebungen verl\u00e4sst sich das Auge haupts\u00e4chlich auf St\u00e4bchen, die \u00e4u\u00dferst lichtempfindlich sind, jedoch keine Farben oder feine Details wahrnehmen k\u00f6nnen. Das skotopische Sehen ist am empfindlichsten gegen\u00fcber blauem Licht, besitzt jedoch insgesamt nur eine sehr eingeschr\u00e4nkte Farbwahrnehmung. St\u00e4bchen funktionieren effektiv bei Leuchtdichten unter etwa 0,005 Lux.<br><br><strong>Photopisches Sehen<\/strong><br><br>Photopisches Sehen tritt bei hohen Beleuchtungsst\u00e4rken auf, etwa bei Tageslicht oder k\u00fcnstlicher Beleuchtung. In diesen Situationen st\u00fctzt sich das Auge haupts\u00e4chlich auf Zapfen, die f\u00fcr Farbwahrnehmung und hohe Sehsch\u00e4rfe verantwortlich sind. Das photopische Sehen erm\u00f6glicht eine ausgezeichnete Farbdifferenzierung. Zapfen arbeiten am effektivsten bei Beleuchtungsst\u00e4rken \u00fcber etwa 5,0 Lux.<br><br><strong>Mesopisches Sehen<\/strong><br><br>Was wir \u00fcblicherweise als \u201enormales\u201c Sehen betrachten, ist \u05dc\u05de\u05e2\u05e9\u05d4 eine Kombination aus skotopischem und photopischem Sehen. Dieser \u00fcberlappende Bereich wird als mesopischer Bereich bezeichnet, in dem St\u00e4bchen und Zapfen gemeinsam zur visuellen Wahrnehmung beitragen.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color has-medium-font-size wp-elements-ed950e3ff655b91ea78743f13eb353bd\"><br><br><strong><em>Was ist das S\/P-Verh\u00e4ltnis?<\/em><\/strong><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-9fe2028abebaf29f295dc05b55b8792b\" style=\"font-size:15px\">Das S\/P-Verh\u00e4ltnis ist unter skotopischen Bedingungen besonders wichtig, da in diesem Fall St\u00e4bchen die visuelle Wahrnehmung dominieren. Das S\/P-Verh\u00e4ltnis ist ein Multiplikator, der angibt, welcher Anteil des emittierten Lichts f\u00fcr das menschliche Sehen wirksam ist. Diese werden als visuell effektive Lumen (VELs) bezeichnet. Der empfohlene S\/P-Wert liegt zwischen 1,8 und 2,0.<br><br>Im Allgemeinen weisen wei\u00dfe Lichtquellen ein h\u00f6heres S\/P-Verh\u00e4ltnis auf, w\u00e4hrend gelbe oder orangefarbene Lichtquellen tendenziell ein niedrigeres S\/P-Verh\u00e4ltnis besitzen.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color has-medium-font-size wp-elements-19dd7e50a84b902cb09434a26114cbe0\"><br><br><strong><em>Was ist die Blaulicht-Gef\u00e4hrdungseinstufung (Blue Hazard Ranking)?<\/em><\/strong><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-a5cbc50d610259ed1dbcc443e12d50a8\" style=\"font-size:15px\">Die Blaulicht-Gef\u00e4hrdungseinstufung misst das Risiko, das eine Lichtquelle f\u00fcr die Augensicherheit darstellt, insbesondere im Zusammenhang mit der Exposition gegen\u00fcber blauem Licht.<br><br>Blaues Licht ist eine Form von hochenergetischem sichtbarem Licht (HEV) und bezeichnet den blauen Bereich des sichtbaren Lichtspektrums. Seine potenziell sch\u00e4dlichen Wirkungen konzentrieren sich haupts\u00e4chlich auf den Wellenl\u00e4ngenbereich von 380 nm bis 450 nm; blaues Licht im Bereich von 450 nm bis 500 nm kann hingegen bestimmte Vorteile bieten. In moderaten Mengen tr\u00e4gt blaues Licht zum allgemeinen Wohlbefinden und zur Vitalit\u00e4t bei. Eine \u00fcberm\u00e4\u00dfige Exposition gegen\u00fcber blauem Licht kann jedoch oxidativen Stress in retinalen Zellen verursachen, was zu irreversiblen photochemischen Sch\u00e4den und einer Verschlechterung von Zellsch\u00e4den in der Makula f\u00fchren kann. Dies wird allgemein als \u201eBlaulichtgefahr\u201c bezeichnet.<br><br>Die IEC-62471-Norm definiert die Methode zur Bewertung des Blaulicht-Risikos von Lichtquellen und Leuchten. Auf Grundlage dieser Norm k\u00f6nnen Produkte in die folgenden Risikogruppen eingeteilt werden:<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-7c43a6309c52fd5bdd157f2532880851\" style=\"font-size:15px\">\ud83d\udd39<strong>RG0<\/strong>: Kein Risiko<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-9b9d56b412a82838e9afcfacbd212fed\" style=\"font-size:15px\">\ud83d\udd39<strong>RG1<\/strong>: Geringes Risiko<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-4987f09f1dfe7e51d5a273260ded8c0f\" style=\"font-size:15px\">\ud83d\udd39<strong>RG2<\/strong>: Mittleres Risiko, Warnhinweise erforderlich<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-d8204ca908a6e3fb5ae5dffa521c2de3\" style=\"font-size:15px\">\ud83d\udd39<strong>RG3<\/strong>: Hohes Risiko \u2013 bereits eine kurzzeitige Exposition gegen\u00fcber der Lichtquelle kann Sch\u00e4den verursachen. Leuchten dieser Kategorie sind in der Regel nicht zul\u00e4ssig.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-61e86a58bf09354602fdf196d2d28532\" style=\"font-size:15px\"><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color has-medium-font-size wp-elements-63a56930878c5fdf9c77dbc512da099b\"><strong><em>Was ist Eb (blau\u00adlicht\u00adgef\u00e4hrdungs\u00adgewichtete Bestrahlungsst\u00e4rke)?<\/em><\/strong><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-951ffba887cfa2e98578b766d7b97de5\" style=\"font-size:15px\">Eb bezeichnet die Bestrahlungsst\u00e4rke von blauem Licht, das von einer kleinen Lichtquelle wie einer LED emittiert wird. Sie wird in Watt pro Quadratmeter (W\/m\u00b2) gemessen.<br><br>Die Blaulicht-Bestrahlungsst\u00e4rke (Eb) wird zur Berechnung der maximal zul\u00e4ssigen Expositionszeit und zur Einstufung in Risikogruppen verwendet. Diese Klassifizierung ist proportional zur effektiven Bestrahlungsst\u00e4rke auf der Netzhaut.<br>Der RG1-Grenzwert f\u00fcr die Blaulicht-Bestrahlungsst\u00e4rke betr\u00e4gt 1 W\/m\u00b2. Dieser Wert markiert den \u00dcbergang von Risikogruppe 1 (RG1) zu Risikogruppe 2 (RG2).<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color has-medium-font-size wp-elements-369c04afe8fcf942ce64d052ddf0b89c\"><br><br><strong><em>Was ist Kbv (Blau\u00adlicht\u00adgef\u00e4hrdungs\u00adstrahlungs\u00adkoeffizient)?<\/em><\/strong><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-b9e72512ef8b95deb40c3fec1463c7f1\" style=\"font-size:15px\">Kbv ist eine Kenngr\u00f6\u00dfe, die im Standard IEC\/TR 62778:2014 \u201eAnwendung der IEC 62471 zur Bewertung der Blaulichtgef\u00e4hrdung von Lichtquellen und Leuchten\u201c eingef\u00fchrt wurde. IEC 62778 liefert Erl\u00e4uterungen und Leitlinien zur Bewertung der Blaulichtgefahr von Beleuchtungsprodukten, die \u00fcberwiegend im sichtbaren Spektralbereich (380 nm\u2013780 nm) emittieren.<br><br>Kbv wird berechnet, indem Eb durch die Beleuchtungsst\u00e4rke (in Lux) geteilt wird. Es stellt im Wesentlichen das Verh\u00e4ltnis des Blaulicht-Gef\u00e4hrdungspotenzials pro Einheit der Lichtleistung dar. Diese Kenngr\u00f6\u00dfen helfen dabei, das potenzielle Risiko von blauem Licht zu quantifizieren, insbesondere im Hinblick auf m\u00f6gliche Sch\u00e4den an der Netzhaut.<br><br>Eb und Kbv werden von Forschenden verwendet, um die photometrischen Gr\u00f6\u00dfen von blauem Licht zu bewerten, die ein photobiologisches Risiko darstellen k\u00f6nnen. Sie bilden die Grundlage f\u00fcr die Einstufung eines Produkts in eine \u201eRisikogruppe (Risk Group)\u201c. Im Wesentlichen sind Eb und Kbv technische Werkzeuge zur Quantifizierung und zum Verst\u00e4ndnis der mit Blaulichtemissionen verbundenen Gefahren \u2013 insbesondere bei unterschiedlichen Lichtquellen \u2013 und unterst\u00fctzen so die Umsetzung geeigneter Sicherheitsma\u00dfnahmen zur Reduzierung potenzieller Risiken.<\/p>\n<\/div>\n<\/div>\n\n\n\n<figure class=\"wp-block-video alignwide\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls src=\"https:\/\/lightingrecipe.com\/wp-content\/uploads\/2025\/08\/Lighting-Fundamentals-Part-5.mp4\"><\/video><\/figure>","protected":false},"excerpt":{"rendered":"<p>Light enters the eyes through the cornea, where it is then focused onto the retina. The retina contains millions of light-sensitive cells called photoreceptors, which are divided into two types: rods and cones. Scotopic Vision Scotopic vision refers to vision in dim lighting conditions, such as at night. In these low-light environments, the eyes primarily rely on rod cells, which are highly sensitive to light but do not detect color or fine detail. Scotopic vision is most sensitive to the color blue, but it has a very limited ability to distinguish colors overall. Rods function effectively at luminance levels below approximately 0.005 lux. Photopic Vision Photopic vision occurs under bright light conditions, such as daylight or artificial lighting. In these situations, the eyes rely on cone cells, which are responsible for color perception and visual acuity. Photopic vision provides excellent color discrimination. Cones function best at luminance levels above approximately 5.0 lux. Mesopic Vision What we typically consider \u201cnormal\u201d vision is actually a combination of scotopic and photopic vision. This overlapping region is known as the mesopic range, where both rods and cones contribute to visual perception. What is S\/P Ratio? The S\/P ratio is particularly important under scotopic conditions, where rod cells dominate visual perception. The S\/P ratio is a multiplier that indicates how much of the emitted light is effective for human vision. These are referred to as visually effective lumens (VELs). A recommended S\/P ratio falls between 1.8 and 2.0. Generally, white light sources have high S\/P ratios, while yellow or orange light sources tend to have low S\/P ratios. What is Blue Hazard Ranking? The Blue Hazard Ranking measures the risk that a light source poses to eye safety, particularly in relation to exposure to blue wavelengths. Blue light is a type of high-energy visible (HEV) light, which refers to the blue portion of the visible light spectrum. Its potentially harmful effects are mainly concentrated in the 380 nm to 450 nm range. Blue light in the 450 nm to 500 nm range can offer certain benefits. In moderate amounts, blue light contributes to overall well-being and vitality. However, excessive blue light exposure can cause oxidative stress in retinal cells, leading to irreversible photochemical damage and worsening of cell injury in the macula. This is commonly referred to as the \u201cblue light hazard.\u201d The IEC 62471 standard defines the method for assessing the blue light risk from light sources and luminaires. Based on this standard, products can be classified into the following risk groups: \ud83d\udd39RG0: No risk \ud83d\udd39RG1: Low risk \ud83d\udd39RG2: Moderate risk, requiring warning labels \ud83d\udd39RG3: High risk \u2014 even brief exposure to the light source can cause damage. Luminaires in this category are generally not permitted. What is Eb (Blue Light Hazard Weighted Irradiance)? Eb refers to the irradiance of blue light emitted from a small light source, such as an LED. It is measured in watts per square meter (W\/m\u00b2). Blue light irradiance (Eb) is used to calculate the maximum exposure time and to determine classification into Risk Groups. This classification is proportional to the effective irradiance at the retina.The RG1 blue light irradiance limit is 1 W\/m\u00b2\u2014this is the threshold at which the transition from Risk Group 1 (RG1) to Risk Group 2 (RG2) occurs. What is Kbv (Blue Light Hazard Radiation Coefficient)? Kbv is a metric introduced in the IEC\/TR 62778:2014 standard, Application of IEC 62471 for the Assessment of Blue Light Hazard to Light Sources and Luminaires. IEC 62778 provides clarification and guidance for assessing the blue light hazard of lighting products that primarily emit in the visible spectrum (380 nm to 780 nm). Kbv is calculated as Eb divided by the illuminance (in lux). It essentially represents the ratio of blue light hazard potential per unit of luminous energy. These metrics help quantify the potential harm of blue light, particularly to the retina. Eb and Kbv are used by researchers to assess the photometric quantities of blue light that may pose a photobiological hazard. They form the basis for determining a product\u2019s \u201cRisk Group\u201d classification. In essence, Eb and Kbv are technical tools used to quantify and understand the hazards associated with blue light emissions, particularly from various light sources, thereby aiding in the implementation of appropriate safety measures to reduce potential risks.<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_glsr_average":0,"_glsr_ranking":0,"_glsr_reviews":0,"footnotes":""},"class_list":["post-2616","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>S\/P Ratio, Blue Hazard Ranking, Eb and Kbv -<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"S\/P Ratio, Blue Hazard Ranking, Eb and Kbv -\" \/>\n<meta property=\"og:description\" content=\"Light enters the eyes through the cornea, where it is then focused onto the retina. The retina contains millions of light-sensitive cells called photoreceptors, which are divided into two types: rods and cones. Scotopic Vision Scotopic vision refers to vision in dim lighting conditions, such as at night. In these low-light environments, the eyes primarily rely on rod cells, which are highly sensitive to light but do not detect color or fine detail. Scotopic vision is most sensitive to the color blue, but it has a very limited ability to distinguish colors overall. Rods function effectively at luminance levels below approximately 0.005 lux. Photopic Vision Photopic vision occurs under bright light conditions, such as daylight or artificial lighting. In these situations, the eyes rely on cone cells, which are responsible for color perception and visual acuity. Photopic vision provides excellent color discrimination. Cones function best at luminance levels above approximately 5.0 lux. Mesopic Vision What we typically consider \u201cnormal\u201d vision is actually a combination of scotopic and photopic vision. This overlapping region is known as the mesopic range, where both rods and cones contribute to visual perception. What is S\/P Ratio? The S\/P ratio is particularly important under scotopic conditions, where rod cells dominate visual perception. The S\/P ratio is a multiplier that indicates how much of the emitted light is effective for human vision. These are referred to as visually effective lumens (VELs). A recommended S\/P ratio falls between 1.8 and 2.0. Generally, white light sources have high S\/P ratios, while yellow or orange light sources tend to have low S\/P ratios. What is Blue Hazard Ranking? The Blue Hazard Ranking measures the risk that a light source poses to eye safety, particularly in relation to exposure to blue wavelengths. Blue light is a type of high-energy visible (HEV) light, which refers to the blue portion of the visible light spectrum. Its potentially harmful effects are mainly concentrated in the 380 nm to 450 nm range. Blue light in the 450 nm to 500 nm range can offer certain benefits. In moderate amounts, blue light contributes to overall well-being and vitality. However, excessive blue light exposure can cause oxidative stress in retinal cells, leading to irreversible photochemical damage and worsening of cell injury in the macula. This is commonly referred to as the \u201cblue light hazard.\u201d The IEC 62471 standard defines the method for assessing the blue light risk from light sources and luminaires. Based on this standard, products can be classified into the following risk groups: \ud83d\udd39RG0: No risk \ud83d\udd39RG1: Low risk \ud83d\udd39RG2: Moderate risk, requiring warning labels \ud83d\udd39RG3: High risk \u2014 even brief exposure to the light source can cause damage. Luminaires in this category are generally not permitted. What is Eb (Blue Light Hazard Weighted Irradiance)? Eb refers to the irradiance of blue light emitted from a small light source, such as an LED. It is measured in watts per square meter (W\/m\u00b2). Blue light irradiance (Eb) is used to calculate the maximum exposure time and to determine classification into Risk Groups. This classification is proportional to the effective irradiance at the retina.The RG1 blue light irradiance limit is 1 W\/m\u00b2\u2014this is the threshold at which the transition from Risk Group 1 (RG1) to Risk Group 2 (RG2) occurs. What is Kbv (Blue Light Hazard Radiation Coefficient)? Kbv is a metric introduced in the IEC\/TR 62778:2014 standard, Application of IEC 62471 for the Assessment of Blue Light Hazard to Light Sources and Luminaires. IEC 62778 provides clarification and guidance for assessing the blue light hazard of lighting products that primarily emit in the visible spectrum (380 nm to 780 nm). Kbv is calculated as Eb divided by the illuminance (in lux). It essentially represents the ratio of blue light hazard potential per unit of luminous energy. These metrics help quantify the potential harm of blue light, particularly to the retina. Eb and Kbv are used by researchers to assess the photometric quantities of blue light that may pose a photobiological hazard. They form the basis for determining a product\u2019s \u201cRisk Group\u201d classification. In essence, Eb and Kbv are technical tools used to quantify and understand the hazards associated with blue light emissions, particularly from various light sources, thereby aiding in the implementation of appropriate safety measures to reduce potential risks.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lightingrecipe.com\/de\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\/\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-21T06:53:14+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data1\" content=\"4\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/lightingrecipe.com\\\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\\\/\",\"url\":\"https:\\\/\\\/lightingrecipe.com\\\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\\\/\",\"name\":\"S\\\/P Ratio, Blue Hazard Ranking, Eb and Kbv -\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lightingrecipe.com\\\/#website\"},\"datePublished\":\"2026-01-13T07:42:19+00:00\",\"dateModified\":\"2026-01-21T06:53:14+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/lightingrecipe.com\\\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\\\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/lightingrecipe.com\\\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/lightingrecipe.com\\\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/lightingrecipe.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"S\\\/P Ratio, Blue Hazard Ranking, Eb and Kbv\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/lightingrecipe.com\\\/#website\",\"url\":\"https:\\\/\\\/lightingrecipe.com\\\/\",\"name\":\"\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/lightingrecipe.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"S\/P Ratio, Blue Hazard Ranking, Eb and Kbv -","robots":{"index":"noindex","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"de_DE","og_type":"article","og_title":"S\/P Ratio, Blue Hazard Ranking, Eb and Kbv -","og_description":"Light enters the eyes through the cornea, where it is then focused onto the retina. The retina contains millions of light-sensitive cells called photoreceptors, which are divided into two types: rods and cones. Scotopic Vision Scotopic vision refers to vision in dim lighting conditions, such as at night. In these low-light environments, the eyes primarily rely on rod cells, which are highly sensitive to light but do not detect color or fine detail. Scotopic vision is most sensitive to the color blue, but it has a very limited ability to distinguish colors overall. Rods function effectively at luminance levels below approximately 0.005 lux. Photopic Vision Photopic vision occurs under bright light conditions, such as daylight or artificial lighting. In these situations, the eyes rely on cone cells, which are responsible for color perception and visual acuity. Photopic vision provides excellent color discrimination. Cones function best at luminance levels above approximately 5.0 lux. Mesopic Vision What we typically consider \u201cnormal\u201d vision is actually a combination of scotopic and photopic vision. This overlapping region is known as the mesopic range, where both rods and cones contribute to visual perception. What is S\/P Ratio? The S\/P ratio is particularly important under scotopic conditions, where rod cells dominate visual perception. The S\/P ratio is a multiplier that indicates how much of the emitted light is effective for human vision. These are referred to as visually effective lumens (VELs). A recommended S\/P ratio falls between 1.8 and 2.0. Generally, white light sources have high S\/P ratios, while yellow or orange light sources tend to have low S\/P ratios. What is Blue Hazard Ranking? The Blue Hazard Ranking measures the risk that a light source poses to eye safety, particularly in relation to exposure to blue wavelengths. Blue light is a type of high-energy visible (HEV) light, which refers to the blue portion of the visible light spectrum. Its potentially harmful effects are mainly concentrated in the 380 nm to 450 nm range. Blue light in the 450 nm to 500 nm range can offer certain benefits. In moderate amounts, blue light contributes to overall well-being and vitality. However, excessive blue light exposure can cause oxidative stress in retinal cells, leading to irreversible photochemical damage and worsening of cell injury in the macula. This is commonly referred to as the \u201cblue light hazard.\u201d The IEC 62471 standard defines the method for assessing the blue light risk from light sources and luminaires. Based on this standard, products can be classified into the following risk groups: \ud83d\udd39RG0: No risk \ud83d\udd39RG1: Low risk \ud83d\udd39RG2: Moderate risk, requiring warning labels \ud83d\udd39RG3: High risk \u2014 even brief exposure to the light source can cause damage. Luminaires in this category are generally not permitted. What is Eb (Blue Light Hazard Weighted Irradiance)? Eb refers to the irradiance of blue light emitted from a small light source, such as an LED. It is measured in watts per square meter (W\/m\u00b2). Blue light irradiance (Eb) is used to calculate the maximum exposure time and to determine classification into Risk Groups. This classification is proportional to the effective irradiance at the retina.The RG1 blue light irradiance limit is 1 W\/m\u00b2\u2014this is the threshold at which the transition from Risk Group 1 (RG1) to Risk Group 2 (RG2) occurs. What is Kbv (Blue Light Hazard Radiation Coefficient)? Kbv is a metric introduced in the IEC\/TR 62778:2014 standard, Application of IEC 62471 for the Assessment of Blue Light Hazard to Light Sources and Luminaires. IEC 62778 provides clarification and guidance for assessing the blue light hazard of lighting products that primarily emit in the visible spectrum (380 nm to 780 nm). Kbv is calculated as Eb divided by the illuminance (in lux). It essentially represents the ratio of blue light hazard potential per unit of luminous energy. These metrics help quantify the potential harm of blue light, particularly to the retina. Eb and Kbv are used by researchers to assess the photometric quantities of blue light that may pose a photobiological hazard. They form the basis for determining a product\u2019s \u201cRisk Group\u201d classification. In essence, Eb and Kbv are technical tools used to quantify and understand the hazards associated with blue light emissions, particularly from various light sources, thereby aiding in the implementation of appropriate safety measures to reduce potential risks.","og_url":"https:\/\/lightingrecipe.com\/de\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\/","article_modified_time":"2026-01-21T06:53:14+00:00","twitter_card":"summary_large_image","twitter_misc":{"Gesch\u00e4tzte Lesezeit":"4\u00a0Minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lightingrecipe.com\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\/","url":"https:\/\/lightingrecipe.com\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\/","name":"S\/P Ratio, Blue Hazard Ranking, Eb and Kbv -","isPartOf":{"@id":"https:\/\/lightingrecipe.com\/#website"},"datePublished":"2026-01-13T07:42:19+00:00","dateModified":"2026-01-21T06:53:14+00:00","breadcrumb":{"@id":"https:\/\/lightingrecipe.com\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\/#breadcrumb"},"inLanguage":"de","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lightingrecipe.com\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lightingrecipe.com\/s-p-ratio-blue-hazard-ranking-eb-and-kbv\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lightingrecipe.com\/"},{"@type":"ListItem","position":2,"name":"S\/P Ratio, Blue Hazard Ranking, Eb and Kbv"}]},{"@type":"WebSite","@id":"https:\/\/lightingrecipe.com\/#website","url":"https:\/\/lightingrecipe.com\/","name":"","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/lightingrecipe.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"}]}},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/lightingrecipe.com\/de\/wp-json\/wp\/v2\/pages\/2616","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lightingrecipe.com\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/lightingrecipe.com\/de\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/lightingrecipe.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lightingrecipe.com\/de\/wp-json\/wp\/v2\/comments?post=2616"}],"version-history":[{"count":2,"href":"https:\/\/lightingrecipe.com\/de\/wp-json\/wp\/v2\/pages\/2616\/revisions"}],"predecessor-version":[{"id":2685,"href":"https:\/\/lightingrecipe.com\/de\/wp-json\/wp\/v2\/pages\/2616\/revisions\/2685"}],"wp:attachment":[{"href":"https:\/\/lightingrecipe.com\/de\/wp-json\/wp\/v2\/media?parent=2616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}