Bright Screens Could Delay Bedtime

[Heddi]

4. I saw an episode of the Canadian "Nova" called The Nature of Things

just a few weeks ago about sleep, and they made the comment that it wasn't just the light, it was the light frequency that was the culprit in disrupting circadian rhythms, especially for overnight-shift-workers like me. I sleep all day, work at night and am surrounded by bright florescent lights which I think are blue wave -length, and then on the drive home I see the blue morning sky which is another blue wavelength, when our circadian rhythm is programmed that blue wavelength = wake up time, and red wavelength (the setting sun, fire, etc) signals us to go to bed.

http://www.cbc.ca/natureofthings/episode/lights-out.html