"In general, we want more light in the morning and especially sunlight, because sunlight is so much brighter than any type of manmade light, our brains don't detect it. We don't see it, but it might be 10 times brighter. But then we want lower lights in the evening and we want less LED lights. The component of light that our body clock is particularly sensitive to is blue light and LED lights actually are very enriched in blue light."
"In general women have more sleep problems. So, insomnia disorder in women, the prevalence can be two times higher in women than men. Now that's maybe not surprising because insomnia is linked with anxiety and depression."
Bright morning sunlight provides a strong circadian signal because sunlight is far brighter than manmade light and is detected more effectively by the brain, sometimes by an order of magnitude. Evening lighting should be reduced and blue-enriched LED exposure minimized because the circadian system is particularly sensitive to blue wavelengths. Lowering blue light in the evening supports sleep onset and circadian alignment. Women experience higher prevalence of sleep problems; insomnia rates in women can be roughly double those in men, a pattern that correlates with higher rates of anxiety and depression among women.
Read at Irish Independent
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