Talk:Full-spectrum light

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Color temperature[edit]

"8,000 – 10,000° Kelvin represents a cloudy day. 5,000 – 5,500° Kelvin represents noonday sunlight." Shouldn't it be the other way around with a black light at 0°? 69.109.58.118 (talk) 11:54, 19 October 2007

For one thing, Kelvins are not measured in degrees. Second, 5000-6500K represents open daylight at low altitude, depending on the time of day, and 8000-10000K is overcast, or high altitude. Think: low color temperature->red, high color temperature->blue. --Adoniscik (talk) 02:14, 22 January 2008 (UTC)[reply]

UV[edit]

Don't the phosphors absorb UV and re-radiate the energy as visible light? — Omegatron 02:04, 8 November 2007 (UTC)[reply]

If that is more than mere speculation can't you provide a reference? Nicmart (talk) 15:38, 14 January 2009 (UTC)[reply]

That's pretty much the definition of what phosphors do. As for phosphors in full-spectrum lights, here's a variety of POVs in book sources. Dicklyon (talk) 19:40, 14 January 2009 (UTC)[reply]

Irrelevant/Informal Post Removed[edit]

There was an irrelevant post at the bottom of the article that was removed. If the submitter wishes to feature this information in the article, please ensure that it is in a more professional manner. —Preceding unsigned comment added by 71.83.38.153 (talk) 05:10, 4 April 2008 (UTC)[reply]

"North sunlight"?[edit]

What the heck is this? If it's "sunlight from the north", does this statement apply equally in the southern hemisphere? 132.239.215.69 (talk) 01:22, 15 July 2009 (UTC)[reply]

Use in seasonal affective disorder[edit]

Under Independent verification:

I found that many, if not all of the references cited in this section suggest that there are indeed correlations between lighting and mood, performance and health. This is directly contrary to the last sentence in this section: “The authors of these papers also have concluded that full-spectrum lighting (~5000 K, CRI>90) does not confer any benefits on performance, mood, or health compared to typical cool-white fluorescent lighting.” To be fair, most of the cited articles maintain that proper, scientific research in this area is lacking and that temperatures, indexes, lamp types, etc. as well as other external variables do confound the research.

Also, the metrics stated in the aforementioned quote may be poor examples (~5000 K, CRI>90). I believe many studies use much higher temperatures; with respect to CRI, I do not have enough information to debate. The quote would be more aligned with the results of the “confounded studies” if it did not mention any metrics at all.

I do not feel qualified to directly edit this wiki as it is only a passing interest of mine and I do not have the scientific background to make comments on the cited research with any degree confidence. Would anyone be willing to assist? Thanks! — Preceding unsigned comment added by McAlistor (talk • contribs) 16:47, 23 November 2011 (UTC)[reply]

Dead Link[edit]

Reference No. 4, "Sylvania's Statement on FS Lighting with US Gov links Sylvania PDF" results in an error at the Sylvania site. Does anyone have more recent information for this PDF? EnamelWildcat (talk) 01:23, 30 December 2013 (UTC)[reply]