Blue Light Reduction Before Bed

Blue light reduction before bed directly counters a primary biological obstacle: blue wavelength screens suppress melatonin production by up to 50%, delaying sleep onset by an average of 18 minutes. Wearing amber-tinted glasses for three hours pre-sleep—or using device filters—improves subjective sleep quality by 42% in controlled studies. While #4's cool temperature addresses core body thermoregulation, blue light reduction is faster to implement and costs as little as $10 for glasses. For best effect, stop screen use for 60–90 minutes before bedtime, as even dim screens disturb endogenous melatonin rhythms.