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Re: cool-white fluorescent tubes

Posted by Dr. Bob on October 28, 1999, at 7:22:24

In reply to Re: SAD-Phototherapy, posted by kjm on October 26, 1999, at 20:44:11

> > regular fluorescent lights are now considered good enough...
> if you have any references, I'd like to read up on
> this.

I did a quick search and turned up the below. It's just a study that uses cool-white, though, not one that compares it to full-spectrum.

Lewy AJ. Bauer VK. Cutler NL. Sack RL. Ahmed S. Thomas KH. Blood ML. Jackson JM. Morning vs evening light treatment of patients with winter depression.
Archives of General Psychiatry. 55 (10): 890-6, 1998 Oct. Comments in: 1998 Oct 55 (10): 861-2, 1998 Oct 55 (10): 863-4.

In the Methods section:


The light fixtures contained two 40-W cool-white fluorescent tubes (Hughes Lighting Technologies, Lake Hopatcong, NJ). To determine the distance to obtain 2500 lux, intensities were measured for each light fixture using a light meter with a photometric sensor. Subjects were instructed to sit 45 degrees to the light with their eyes at midfixture level and to gaze across it once or twice a minute, rather than stare directly at it.




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