MELATONIN, SLEEP, AND THE PREVENTION OF CANCER
Light at night is associated with an elevated risk of various types of cancer. Evidence suggests that this results from low levels of the sleep hormone, melatonin, whose secretion by the pineal gland is turned off when you are exposed to light. Only the shorter wavelengths of light -blue and to some extent the aqua- have this effect, however. Thus, studies have shown that wearing special glasses that filter out blue to green light increase the concentration of melatonin in the blood. While improving your sleep, wearing such glasses when up late at night, or using special light bulbs, prior to bed time (and if you wake up to use the bathroom), also may reduce your cancer risk. This is why I endorse Low Blue Lights. I wear their glasses and use their bulbs. Check it out!