{"id":719,"date":"2017-05-03T09:00:59","date_gmt":"2017-05-03T13:00:59","guid":{"rendered":"https:\/\/designinglight.com\/?p=719"},"modified":"2017-05-01T15:16:23","modified_gmt":"2017-05-01T19:16:23","slug":"cie-adopts-tm-30-sort-of","status":"publish","type":"post","link":"https:\/\/designinglight.com\/?p=719","title":{"rendered":"CIE Adopts TM-30 (sort of)"},"content":{"rendered":"

The CIE has issued a statement titled “CIE 2017 Colour Fidelity Index for accurate scientific use<\/a>” in which they partially adopt the R<\/em>f fidelity metric of TM-30. \u00a0Here are some of the details.<\/p>\n

When the IES released TM-30-15 it seemed to be a wake up call for the CIE, who have understood the inaccuracies\u00a0of CRI but haven’t been able to build the internal consensus to correct them. \u00a0Two\u00a0CIE committees soon began \u00a0work, one on the issue of fidelity and one on other perception related issues. \u00a0The committee that worked on fidelity (TC 1-90) has decided to adopt TM-30 R<\/em>f with a few minor changes to the calculation. \u00a0They are calling this the CIE 2017 Color Fidelity Index, which will still be described as R<\/em>f, and are asking the IES to adopt the same changes to the calculation so that both R<\/em>fs are the same.<\/p>\n

However, at this time there is no retirement date for CRI, even though they acknowledge that R<\/em>f is more accurate. \u00a0The logic is a bit twisted. \u00a0Since CRI is used for purposes other than the intended purpose, and since TM-30 doesn’t satisfy those purposes, we’re going to continue to mis-use CRI. \u00a0Meanwhile, “replacement of the CRI will be a matter of future study and discussion.”<\/p>\n

I’ll probably have more to say once I read the entire report. \u00a0If you want to read the report yourself\u00a0you can purchase\u00a0it here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

The CIE has issued a statement titled “CIE 2017 Colour Fidelity Index for accurate scientific use” in which they partially adopt the Rf fidelity metric of TM-30. \u00a0Here are some of the details. When the IES released TM-30-15 it seemed to be a wake up call for the CIE, who have understood the inaccuracies\u00a0of CRI … Continue reading CIE Adopts TM-30 (sort of)<\/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":[12,17],"tags":[27,26,68],"class_list":["post-719","post","type-post","status-publish","format-standard","hentry","category-color","category-light","tag-color-rendering","tag-cri","tag-tm-30"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p4gZSw-bB","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":4324,"url":"https:\/\/designinglight.com\/?p=4324","url_meta":{"origin":719,"position":0},"title":"CIE Recommends Transition from CRI to Rf","author":"Jason Livingston","date":"January 21, 2025","format":false,"excerpt":"Earlier this month, CIE published CIE Position Statement on Color Quality Metrics, in which it recommends the lighting industry transition from the outdated and sometimes inaccurate General Color Rendering Index (CRI) to the General Color Fidelity Index (Rf ) defined in CIE 224:2017. \u00a0The position statement notes that problems with\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":780,"url":"https:\/\/designinglight.com\/?p=780","url_meta":{"origin":719,"position":1},"title":"The Advantages of TM-30","author":"Jason Livingston","date":"October 30, 2017","format":false,"excerpt":"In this series of posts about IES TM-30-15 I've discussed the problems with CRI and the resistance to adopting TM-30. \u00a0In this post I'll discuss the advantages of TM-30 over CRI, and what TM-30 is and isn't. Color Samples Like CRI, TM-30 compares color samples rendered by a given test\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2017\/10\/TM-30-Bins.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2017\/10\/TM-30-Bins.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2017\/10\/TM-30-Bins.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":2447,"url":"https:\/\/designinglight.com\/?p=2447","url_meta":{"origin":719,"position":2},"title":"Manufacturers Don’t Understand Color Rendering","author":"Jason Livingston","date":"March 17, 2022","format":false,"excerpt":"I attended LEDucation in New York City this week. \u00a0While there I spoke to over two dozen manufacturers, none of whom understood color rendering beyond the (partially accurate) belief that higher CRI is better. \u00a0My conversations when like this. Lighting Salesperson: \"Our color rendering is great. \u00a0Our CRI is over\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":5394,"url":"https:\/\/designinglight.com\/?p=5394","url_meta":{"origin":719,"position":3},"title":"A Brief History of TM-30","author":"Jason Livingston","date":"April 9, 2026","format":false,"excerpt":"Next Wednesday I\u2019ll be giving a presentation on LP-30 at LEDucation (hope to see you there!), and in preparing for it I\u2019ve been reflecting on how far we\u2019ve come in our understanding and evaluation of color rendering. \u00a0 The Color Rendering Index (CRI) was published by the International Commission on\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":386,"url":"https:\/\/designinglight.com\/?p=386","url_meta":{"origin":719,"position":4},"title":"A New Color Rendering Metric","author":"Jason Livingston","date":"May 11, 2015","format":false,"excerpt":"At last week\u2019s Lightfair one of the presentations was Quantifying Color Rendition: A Path Forward. The presentation was the first public look at the (not yet approved) IES Method of quantifying color rendering. What is this new (not yet approved) IES Method? Let\u2019s start with a quick review of the\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"CRI Test Color Sample SPDs","src":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2015\/05\/CIE_CRI_TCS_SPDs.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2015\/05\/CIE_CRI_TCS_SPDs.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2015\/05\/CIE_CRI_TCS_SPDs.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":567,"url":"https:\/\/designinglight.com\/?p=567","url_meta":{"origin":719,"position":5},"title":"NEMA Misrepresents IES TM-30","author":"Jason Livingston","date":"December 21, 2015","format":false,"excerpt":"On November 12 the National Electrical Manufacturers Association (NEMA) published a position paper on IES TM-30-15. The document is here. It seems to be a willful misunderstanding and misrepresentation of TM-30. Here\u2019s how\u2026 The paper opens with NEMA\u2019s support of an improved color metric but then goes on to say\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\/719","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=719"}],"version-history":[{"count":1,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/719\/revisions"}],"predecessor-version":[{"id":720,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/719\/revisions\/720"}],"wp:attachment":[{"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=719"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}