It has long been known that blue light, especially in the 480 nm range, affects sleep-wake cycles by disrupting circadian rhythms. Researchers have developed LEDs that emit 480 nm during the day and 450 nm in the evening, effectively reducing their harmful effects on the body’s melatonin production.
In a study of 22 healthy adult male volunteers, exposure to human-targeted LEDs increased nighttime melatonin levels by 12.2% and decreased daytime melatonin levels by 21.9% compared to regular LEDs.
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Source: Ferra
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