Talk:Color rendering index

Obsolete merge proposal
Oppose - color rendering index is a very specific measurement and should not be confused with other measures of color rendering. PAR 04:07, 5 April 2006 (UTC)

Oppose - It should not be merged, however there ought to be something in the text that explains the use of the CRI with respect to current lighting technologies. (e.g. fluorescent tubes, LED replacements for incandescents, etc) Any chance someone can offer clarification about what is meant by "perceived"? (Quoting from the article page, "The perceived colors under the reference and test illumination ...". The "perceived colors" can be determined by a human, which isn't subject to calibration, or it can be determined by a device that would be calibratable (if this is a word) to a spectrum based on known wavelengths. — Preceding unsigned comment added by JohnP (talk • contribs) 08:36, 19 April 2006 (UTC)

Oppose -- CRI is a very specific and measurable quality of light. Perhaps a better solution would be to create a more general "Color Rendering qualities of Light" topic wherein various measurables both quanititive and qualitative could be discussed — Preceding unsigned comment added by 161.88.255.139 (talk) 17:43, 2 May 2006 (UTC)

Agree in part -- CRI is a terrible metric to use by any lighting expert's standards. However it is specific and important for historic reasons. Not to mention it's dominance in household products. CRI deserves to remain a page perhaps with the heading "CIE Color Rendering Index" to more specifically refer to the named standard. A new page on the topic of color rendering should be written using the following definition "The property of a lighting fixture which describes how the light it produces will affect the appearance of colored materials" TDcolor (talk) 19:39, 2 January 2021 (UTC)

Request: Add still photo to the "Film and video high-CRI LED lighting incompatibility" section.
The "Film and video high-CRI LED lighting incompatibility" section describes the applicability of CRI scores to film and video results. Still digital photography is not specifically mentioned. Could such material be added? — Preceding unsigned comment added by Dmk5717 (talk • contribs) 17:52, 3 June 2019 (UTC)

Request Move / Re-org
Hi all. Like the above very old merge request mentions. There are numerous reasons why this page needs extensive editing.

1) The topic of "Color Rendering" in color science / lighting science has come to mean much much more than the CIE CRI standard.

2) The CIE no longer endorses the use of CRI although has not replaced it. In 2015 they endorsed the IES TM-30 standard

3) Many of the "alternatives" are not really contenders in the lighting community. SSI, TLCI, and TM-30 are pretty much the only 3 new standards that matter to a wide audience at this point.

Therefore I think a page specifically called "Color Rendering" should be created which just defines the topic provides a paragraph overview of the most important standards and links to their pages. Important specific pages would, at the very least include "CRI, TLCI, TM-30", and "SSI".

I am happy to work on these articles but I'm a new wikipedian, I don't know the best ways to go about this.

Lastly, since part of what I am discussing doesn't have a clear place for content like the CQS paragraphs, I would move these to the "Color Rendering" topic page in some kind of "other alternatives" just so that interested readers could know that they are out there and have some search terms for them. I'm not willing, at this time, to cover those in depth.

TDcolor (talk) 19:48, 2 January 2021 (UTC)


 * I see this article as only for CRI per its name. I am confused why it jumps to talking about color rendering in general.  I think a separate article called Color rendering that discusses color rendering in general with this article linking back to that would make this page cleaner and the topics easier to understand.  --tonsofpcs (Talk) 03:20, 5 January 2021 (UTC)
 * Support the creation of a separate Color rendering article., I've finished stubbing the target article out, but I am afraid I don't have time to do the reorganization (i.e. move stuff there) for now. --Artoria2e5 🌉 06:09, 15 November 2021 (UTC)
 * Thanks. It's a good change. I like the new article. I'd love to contribute more but it's kind of difficult scheduling and I'm a new wikipedian. Great to pull out the different relevant standards in a bulleted list. Mainly material needs to get moved from this article into the new article, then this needs to get parred down just to the text of the CIE document for color rendering index. I'll have to look up the relevant standards later. TDcolor (talk) 18:49, 14 March 2022 (UTC)

Downgrade to C
I have downgraded this article to "C" for two reasons:

1) It does not contain up-to-date information on the status of CRI in the lighting science community where it has become highly frowned upon.

2) It contains dissorganized or out of place information about alternatives that either needs to be cleaned up or replaced with a better topic page / structure.

Please see Request Move / Re-org for suggestions.

TDcolor (talk) 19:53, 2 January 2021 (UTC)

Health effects?
How does having a high CRI affect health compared to lower CRI? 198.52.172.227 (talk) 08:37, 8 April 2022 (UTC)

TCS15 / R15 for skin tones?
The "Test color samples" of the article talks about a 14 color scale. But a 15th color (TCS15, 1YR6/4) for skin tones is often cited as part of CRI. It's mentioned later in the Wikipedia article. I'm not a domain expert but I gather this is a recent addition. Should it be included with the other 14 samples? Nelson Minar (talk) 16:54, 30 March 2023 (UTC)

Proposed merge of High-CRI LED lighting into Color rendering index
Wide overlap and duplication. fgnievinski (talk) 05:16, 10 April 2023 (UTC)


 * This seems like a bad idea. These are two completely different subjects. One is about a kind of lamps, and the other is about a standard metric by which lamps can be measured. The High-CRI LEDs article should be slimmed down and refocused on the details of the lamps rather than on explaining the CRI. ––jacobolus (t) 07:08, 10 April 2023 (UTC)
 * That makes sense to me--to slim down the high CRI LEDs article and refer readers to this one more as needed. Ccrrccrr (talk) 02:26, 12 April 2023 (UTC)