{"id":1264,"date":"2020-08-19T12:04:52","date_gmt":"2020-08-19T16:04:52","guid":{"rendered":"https:\/\/designinglight.com\/?p=1264"},"modified":"2020-08-19T12:04:52","modified_gmt":"2020-08-19T16:04:52","slug":"standard-189-1-now-includes-tm-30-requirements","status":"publish","type":"post","link":"https:\/\/designinglight.com\/?p=1264","title":{"rendered":"Standard 189.1 Now Includes TM-30 Requirements"},"content":{"rendered":"\n

Yesterday an addendum<\/a> to ANSI\/ASHRAE\/ICC\/USGBC\/IES Standard 189.1-2017 Standard for the Design of High-Performance Green Buildings<\/em> 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:<\/p>\n\n\n\n

8.3.5.3 Color Rendition.\u00a0<\/strong>At least 95% of lighting power of nominally white lighting within each\u00a0enclosed space\u00a0<\/em>shall be provided by luminaires that meet the following criteria at full light output in accordance with IES-TM-30, Annex E, P2 and F3:
1. Rf<\/sub><\/em> of at least 85
2. Rf,h1<\/sub><\/em> of at least 85
3. Rg<\/sub><\/em> of at least 92
4. Rcs,h1<\/sub><\/em> of at least -7% but no greater than +19%<\/p>

Nominally white lighting is lighting that has chromaticity within the basic or extended nominal color correlated temperature (CCT) specifications of ANSI C78.377. <\/p>

Where a lighting system is capable of changing its spectrum, it shall be capable of meeting the color rendition requirements within each nominal CCT of 2700 K, 3500 K, 4000 K, and 5000 K, as defined in ANSI C78.377, that the system is capable of delivering.<\/p><\/blockquote>\n\n\n\n

I hope that this is going to put more pressure on manufacturers to improve the color rendering of their luminaires as measured by TM-30, not CRI, and to provide TM-30 information on their cut sheets. If not, they’ll risk not being considered on projects that have TM-30 requirements.<\/p>\n","protected":false},"excerpt":{"rendered":"

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: 8.3.5.3 Color Rendition.\u00a0At least 95% … Continue reading Standard 189.1 Now Includes TM-30 Requirements<\/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":[5,12,7,11,10,4],"tags":[27,24,68],"class_list":["post-1264","post","type-post","status-publish","format-standard","hentry","category-codes","category-color","category-documentation","category-leds","category-luminaires","category-sustainability","tag-color-rendering","tag-led-color","tag-tm-30"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p4gZSw-ko","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":430,"url":"https:\/\/designinglight.com\/?p=430","url_meta":{"origin":1264,"position":0},"title":"Standard 189.1 Addendum Are Open For Public Review","author":"Jason Livingston","date":"July 30, 2015","format":false,"excerpt":"ASHRAE has announced a 30-day public review and comment period for addendum to ASHRAE\/USGBC\/IES Standard 189.1-2014, beginning on July 24th. \u00a0The addendum that concerns lighting designers\u00a0corrects and clarifies a potentially confusing\u00a0requirement in which a designer may conclude that bonus\u00a0lighting power control factors from Table 9.6.3 Control\u00a0Factors Used in Calculating Additional\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":567,"url":"https:\/\/designinglight.com\/?p=567","url_meta":{"origin":1264,"position":1},"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":[]},{"id":5264,"url":"https:\/\/designinglight.com\/?p=5264","url_meta":{"origin":1264,"position":2},"title":"TM-30 Users Guide Now Available","author":"Jason Livingston","date":"February 19, 2026","format":false,"excerpt":"I'm delighted to announce that ANSI\/IES LP-30 Lighting Practice: A Comprehensive Guide to Specifying Color Rendition \u2014 Concepts, Criteria, and Implementation is now available in the IES Online Lighting Library and the IES Store. For more than three years, a half dozen IES Color Committee members worked to create a\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"IES LP-30","src":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2026\/02\/LP-30-26_cover-510x660-1-232x300.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":5135,"url":"https:\/\/designinglight.com\/?p=5135","url_meta":{"origin":1264,"position":3},"title":"TM-30 and LP-30 at Lightovation","author":"Jason Livingston","date":"December 3, 2025","format":false,"excerpt":"The IES is about to publish ANSI\/IES LP-30 Lighting Practice:\u00a0 A Comprehensive Guide to Specifying Color Rendition \u2013\u00a0 Concepts, Criteria, and Implementation, which is essentially a user's guide to TM-30. \u00a0The IES Color Committee worked on it for over two years to create an easy to read, comprehensive, phase-by-phase guide\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"Lightovations 2026 Logo","src":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2025\/12\/image002.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2025\/12\/image002.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2025\/12\/image002.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":4823,"url":"https:\/\/designinglight.com\/?p=4823","url_meta":{"origin":1264,"position":4},"title":"False TM-30 Reports","author":"Jason Livingston","date":"August 20, 2025","format":false,"excerpt":"I recently received a set of lighting submittals. \u00a0In them, one manufacturer had included TM-30 Full Reports. \u00a0At first I was delighted, thinking, \"Finally, a manufacturer who's made TM-30 a default part of their documentation!\" \u00a0Here's the report. \u00a0 My excitement was followed, a few seconds later, by a sinking\u2026","rel":"","context":"In "Color"","block_context":{"text":"Color","link":"https:\/\/designinglight.com\/?cat=12"},"img":{"alt_text":"false tm-30 report","src":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2025\/08\/False-TM-30-Report-873x1024.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2025\/08\/False-TM-30-Report-873x1024.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2025\/08\/False-TM-30-Report-873x1024.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/designinglight.com\/wp-content\/uploads\/2025\/08\/False-TM-30-Report-873x1024.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":5394,"url":"https:\/\/designinglight.com\/?p=5394","url_meta":{"origin":1264,"position":5},"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":[]}],"_links":{"self":[{"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/1264","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=1264"}],"version-history":[{"count":1,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/1264\/revisions"}],"predecessor-version":[{"id":1265,"href":"https:\/\/designinglight.com\/index.php?rest_route=\/wp\/v2\/posts\/1264\/revisions\/1265"}],"wp:attachment":[{"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/designinglight.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}