Quote:
Originally Posted by GreenMonkey
Not just LCD screens, but any bright displays. Older CRTs included. Same principle. Light shining in the eyes, melatonin, etc.
That's why if you have trouble sleeping, they tell you, no TVs in the bedroom, no laptops in bed, etc.
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not 100% accurate. The light in question seems to need to be full spectrum which is a color temperature of ~6000k - 6500k to potentially affect circadian rhythm. So the degree of potential affect will vary from LCD to LCD as well as CRT to CRT. If the backlight is red-shifted then odds are it won't be near to 6500K color temp for the light. And that is the point of the studies, the displays are shining daylight temperature into people's eyes which tells the brain it's not yet time for sleep.
BTW, this also applies to the newer CFL bulbs in your lights. You definitely do not want full spectrum lights in your bedroom, or even complete home should you be having sleep issues. They would be fine to use during the day, especially if you are doing something color sensitive but as the day goes on you want to move to the 2500K-3200K bulbs instead. People in this situation often over look the color temp of the bulbs in the house. If it says either "daylight", "full spectrum" or has a color temp written on it in the 5000K+ range then it could be a factor as well.