{"id":692,"date":"2017-03-27T14:21:56","date_gmt":"2017-03-27T18:21:56","guid":{"rendered":"https:\/\/designinglight.com\/?p=692"},"modified":"2017-03-27T14:21:56","modified_gmt":"2017-03-27T18:21:56","slug":"lrc-responds-to-ama-on-leds","status":"publish","type":"post","link":"https:\/\/designinglight.com\/?p=692","title":{"rendered":"LRC Responds to AMA on LEDs"},"content":{"rendered":"<p>You may remember that in June of last year the American Medical Association (AMA) released a report called \u201c<a href=\"https:\/\/www.ama-assn.org\/sites\/default\/files\/media-browser\/public\/about-ama\/councils\/Council%20Reports\/council-on-science-public-health\/a16-csaph2.pdf\">Human and Environmental Effects of Light Emitting Diode (LED) Community Lighting<\/a>.\u201d The report made some noise in the general press because it supported the idea that blue light from blue-pump white LEDs contribute to disability glare and retinal damage.<\/p>\n<p>In the lighting community there was a considerable amount of frustration and anger over the report for several reasons. First, there were quite a few references cited that were either hearsay, such as a New York Times article about Brooklyn residents who didn\u2019t like their new LED street lights, or were irrelevant, such as several articles about the effect of skyglow on nesting turtles. The other reason was that there was not a single lighting designer or researcher on the panel. Overall, it was a poorly researched paper that didn\u2019t deserve the attention it received.<\/p>\n<p>Shortly after it was issued, the Lighting Research Center at RPI issued a <a href=\"http:\/\/www.lrc.rpi.edu\/resources\/newsroom\/AMA.pdf\">response paper<\/a>. On March 15 the authors of that paper held a webinar to further address the AMA report. A video of that webinar is now available. If you\u2019ve got an hour, take a look.<\/p>\n<div class=\"jetpack-video-wrapper\"><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"863\" height=\"486\" src=\"https:\/\/www.youtube.com\/embed\/2BcfcONrm58?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en-US&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/div>\n<p>The key takeaways regarding the hazard of blue light from LEDs and the report are:<\/p>\n<ol>\n<li>The criteria of blue light hazard for retinal damage is much more than just color temperature, and includes the source size, intensity per unit area on the retina, and SPD of the light source.<\/li>\n<li>Disability glare is not a function of light source SPD, as the AMA paper suggests, although discomfort glare is. Short wavelengths increase discomfort glare.<\/li>\n<li>Color temperature is the wrong measurement to determine whether or not a light source will affect the circadian system and melatonin production because color temperature does not provide complete SPD information. \u00a0 \u00a0 \u00a0 For example, some 3,000 K LEDs can have a greater impact than 4,000 K LEDs.<\/li>\n<li>The criteria of blue light hazard for circadian disruption from a light source include \u2013 the intensity, duration of exposure, timing of exposure, and SPD.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>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 contribute to disability glare and &hellip; <a href=\"https:\/\/designinglight.com\/?p=692\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">LRC Responds to AMA on LEDs<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_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}},"categories":[12,3,11,17,15],"tags":[29,24,59],"class_list":["post-692","post","type-post","status-publish","format-standard","hentry","category-color","category-health","category-leds","category-light","category-vision","tag-color-temperature","tag-led-color","tag-light-and-health"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p4gZSw-ba","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":689,"url":"https:\/\/designinglight.com\/?p=689","url_meta":{"origin":692,"position":0},"title":"Street Lighting and Blue Light Information from the Department of Energy","author":"Jason Livingston","date":"March 21, 2017","format":false,"excerpt":"News stories generated by the American Medical Association\u2019s (AMA)\u00a0community guidance on street lighting\u00a0has elevated\u00a0the topic of LED street lighting and its potential effects on health and the environment in the public\u2019s mind. Discussions of these issues have\u00a0many misperceptions and mischaracterizations of the technical information, and\u00a0the difference between what has and\u2026","rel":"","context":"In &quot;Color&quot;","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":738,"url":"https:\/\/designinglight.com\/?p=738","url_meta":{"origin":692,"position":1},"title":"IES Disagrees With AMA on Night Time Outdoor Lighting","author":"Jason Livingston","date":"June 28, 2017","format":false,"excerpt":"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,\u2026","rel":"","context":"In &quot;Color&quot;","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":198,"url":"https:\/\/designinglight.com\/?p=198","url_meta":{"origin":692,"position":2},"title":"New LED Performance Measurements","author":"Jason Livingston","date":"July 9, 2014","format":false,"excerpt":"The Illuminating Engineering Society (IES) has published two new documents related to measuring the performance of Light Emitting Diodes (LEDs).\u00a0 The titles, as well as the aspects that are included and excluded, reveal the complexity of LEDs. The basic problem is that LEDs typically do not fail the way other\u2026","rel":"","context":"In &quot;LEDs&quot;","block_context":{"text":"LEDs","link":"https:\/\/designinglight.com\/?cat=11"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":676,"url":"https:\/\/designinglight.com\/?p=676","url_meta":{"origin":692,"position":3},"title":"How Bright Are Colored LEDs?","author":"Jason Livingston","date":"January 29, 2017","format":false,"excerpt":"Measuring and describing the brightness of colored LEDs is an increasingly important part of a lighting designer\u2019s practice. They are used more often, and in more types of projects, than ever before. Yet, we don\u2019t have an accurate method for understanding exactly how much light is being produced and how\u2026","rel":"","context":"In &quot;Color&quot;","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2017\/01\/VLambda.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2017\/01\/VLambda.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2017\/01\/VLambda.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":223,"url":"https:\/\/designinglight.com\/?p=223","url_meta":{"origin":692,"position":4},"title":"Circadian Lighting","author":"Jason Livingston","date":"October 4, 2014","format":false,"excerpt":"A recent article in The Wall Street Journal discussed the possibilities and benefits of lighting systems that shift color to mimic the changes in daylight. It\u2019s a complicated subject so it\u2019s not surprising that some of what\u2019s reported is inaccurate, so let me clarify a few things. First, our current\u2026","rel":"","context":"In &quot;Health&quot;","block_context":{"text":"Health","link":"https:\/\/designinglight.com\/?cat=3"},"img":{"alt_text":"ipRGC (black), rod (blue), and cone (red) sensitivity curves","src":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2014\/10\/VLambda-phot-scot-circ-300x254.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":736,"url":"https:\/\/designinglight.com\/?p=736","url_meta":{"origin":692,"position":5},"title":"A New Report on LED Color Shift","author":"Jason Livingston","date":"June 15, 2017","format":false,"excerpt":"Like other lighting technologies, the color or chromaticity of light emitted by an LED can shift over time. \u00a0To address the challenge of developing accurate lifetime claims, DOE, together with the Next Generation Lighting Industry Alliance, formed an industry working group, the LED Systems Reliability Consortium (LSRC). \u00a0A new LSRC\u2026","rel":"","context":"In &quot;Color&quot;","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\/692","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=692"}],"version-history":[{"count":1,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/692\/revisions"}],"predecessor-version":[{"id":693,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/692\/revisions\/693"}],"wp:attachment":[{"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}