Hormonal
Chronic exposure to blue light at night, particularly from artificial sources like LED screens, disrupts circadian rhythms by suppressing melatonin, leading to sleep onset delays and increased health risks such as breast cancer in shift workers.
If you must use screens at night, use software that removes blue wavelengths (night shift mode) or wear amber-tinted glasses. Prioritize bright morning sunlight to help reset your clock after a night of disrupted light. For shift workers, strategic light exposure (bright light during shift, dark glasses on commute home) is critical.
Chronic exposure to low-intensity blue light directly before bedtime, may have serious implications on sleep quality, circadian phase and cycle durations. ... Prolonged periods of work during the night are the most extreme source of wrong timed exposure to light, which leads to a simultaneous reduction of melatonin production, sleep deprivation and circadian disruption.
Why this rating
Supported by epidemiological studies and meta-analyses linking shift work (nighttime light exposure) to increased breast cancer risk.
Source
The inner clock—Blue light sets the human rhythm
Siegfried Wahl et al. · Journal of Biophotonics · 2019
DOI 10.1002/jbio.201900102
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