{"id":738,"date":"2017-06-28T15:40:26","date_gmt":"2017-06-28T19:40:26","guid":{"rendered":"https:\/\/designinglight.com\/?p=738"},"modified":"2017-06-28T15:40:26","modified_gmt":"2017-06-28T19:40:26","slug":"ies-disagrees-with-ama-on-night-time-outdoor-lighting","status":"publish","type":"post","link":"https:\/\/designinglight.com\/?p=738","title":{"rendered":"IES Disagrees With AMA on Night Time Outdoor Lighting"},"content":{"rendered":"

Last year the AMA issued Policy H-135.927\u00a0Human and Environmental Effects of Light Emitting Diode (LED) Community Lighting<\/a>, which recommended, among other things, that LED outdoor lighting should have a CCT of 3000 K or below. \u00a0The AMA made this recommendation thinking that lower correlated color temperatures contain less blue light, which can disrupt circadian rhythms.<\/p>\n

Today the IES issued a Position Statement<\/a> disputing that recommendation, noting that CCT<\/p>\n

is inadequate for the purpose of evaluating possible health outcomes; and that the recommendations target only one component of light exposure (spectral composition) of what are well known and established multi-variable inputs to light dosing that affect sleep disruption, including the quantity of light at the retina of the eye and the duration of exposure to that light. A more widely accepted input to the circadian system associated with higher risk for sleep disruption and associated health concerns is increased melanopic content, which is significantly different than CCT. LED light sources can vary widely in their melanopic content for any given CCT; 3000 K LED light sources could have higher relative melanopic content than 2800 K incandescent lighting or 4000 K LED light sources, for example.<\/p><\/blockquote>\n

Follow the link to read the entire Position Statement. \u00a0Blue light hazard, light’s impact on circadian rhythms and overall health, and related topics are a hot area of research. \u00a0We’re learning more all the time, but we don’t yet know enough to apply circadian lighting to every situation. \u00a0Outdoor and street lighting are among the areas where research is not yet conclusive.<\/p>\n","protected":false},"excerpt":{"rendered":"

Last year the AMA issued Policy H-135.927\u00a0Human and Environmental Effects of Light Emitting Diode (LED) Community Lighting, which recommended, among other things, that LED outdoor lighting should have a CCT of 3000 K or below. \u00a0The AMA made this recommendation thinking that lower correlated color temperatures contain less blue light, which can disrupt circadian rhythms. … Continue reading IES Disagrees With AMA on Night Time Outdoor Lighting<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[12,11,17],"tags":[27,24,59],"class_list":["post-738","post","type-post","status-publish","format-standard","hentry","category-color","category-leds","category-light","tag-color-rendering","tag-led-color","tag-light-and-health"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p4gZSw-bU","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":4039,"url":"https:\/\/designinglight.com\/?p=4039","url_meta":{"origin":738,"position":0},"title":"How are CCT and Duv Calculated? IES TM-40","author":"Jason Livingston","date":"September 30, 2024","format":false,"excerpt":"If you look up the definition of Correlated Color Temperature (CCT) in IES LS-1 you'll find, \"The absolute temperature of a blackbody whose chromaticity most nearly resembles that of the light source.\" \u00a0It seems straightforward. \u00a0The spectra of non-incandescent light sources don't exactly match a blackbody radiator. \u00a0They'll plot off\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"C78.377 chromaticity quadrangles","src":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2024\/09\/3.8-C78.377-300x300.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":2910,"url":"https:\/\/designinglight.com\/?p=2910","url_meta":{"origin":738,"position":1},"title":"CCT Doesn’t Predict Circadian Impact","author":"Jason Livingston","date":"January 2, 2023","format":false,"excerpt":"Two of my IES Color Committee friends and colleagues, Tony Esposito and Kevin Houser, have just published a paper in Scientific Reports that looks at the common assumption that CCT can be used to assess circadian entrainment and other biological impacts of light. The assumption by many is that high\u2026","rel":"","context":"In "Calculations"","block_context":{"text":"Calculations","link":"https:\/\/designinglight.com\/?cat=6"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":838,"url":"https:\/\/designinglight.com\/?p=838","url_meta":{"origin":738,"position":2},"title":"Night Shift? Not Quite.","author":"Jason Livingston","date":"May 14, 2018","format":false,"excerpt":"We've all heard about the effect blue light can have on our circadian rhythms. \u00a0It can suppress the release of melatonin, which can delay sleep and reduce sleep quality with possible long-term health consequences. \u00a0Circadian disruption has been associated with depression and increased risk of diseases such as diabetes, obesity\u2026","rel":"","context":"In "Health"","block_context":{"text":"Health","link":"https:\/\/designinglight.com\/?cat=3"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1264,"url":"https:\/\/designinglight.com\/?p=1264","url_meta":{"origin":738,"position":3},"title":"Standard 189.1 Now Includes TM-30 Requirements","author":"Jason Livingston","date":"August 19, 2020","format":false,"excerpt":"Yesterday an addendum to ANSI\/ASHRAE\/ICC\/USGBC\/IES Standard 189.1-2017 Standard for the Design of High-Performance Green Buildings was published. The addendum makes changes to Section 8.3.5, which covers lighting. One of the biggest changes is to add TM-30 color rendition criteria to the section on Indoor Lighting Quality. Here's the relevant text:\u2026","rel":"","context":"In "Codes"","block_context":{"text":"Codes","link":"https:\/\/designinglight.com\/?cat=5"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1650,"url":"https:\/\/designinglight.com\/?p=1650","url_meta":{"origin":738,"position":4},"title":"What is the Reference Illuminant?","author":"Jason Livingston","date":"May 11, 2021","format":false,"excerpt":"Over the past few months I\u2019ve had a manufacturer, a sales rep, and a lighting designer all tell me they think CRI compares a light source to daylight.\u00a0\u00a0When I tried to correct one of them the reply was an acknowledgment that an incandescent source is normally used, but daylight can\u2026","rel":"","context":"In \"color rendering\"","block_context":{"text":"color rendering","link":"https:\/\/designinglight.com\/?tag=color-rendering"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":692,"url":"https:\/\/designinglight.com\/?p=692","url_meta":{"origin":738,"position":5},"title":"LRC Responds to AMA on LEDs","author":"Jason Livingston","date":"March 27, 2017","format":false,"excerpt":"You may remember that in June of last year the American Medical Association (AMA) released a report called \u201cHuman and Environmental Effects of Light Emitting Diode (LED) Community Lighting.\u201d The report made some noise in the general press because it supported the idea that blue light from blue-pump white LEDs\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/738","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=738"}],"version-history":[{"count":2,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/738\/revisions"}],"predecessor-version":[{"id":741,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/738\/revisions\/741"}],"wp:attachment":[{"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}