Research — Light & Circadian Rhythm

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This library reports what studies found. An entry describes a study's design, its findings in its own terms, and its limits. Nothing here is a claim about what a Sage Co. home does, delivers, or prevents.

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[ESTABLISHED]Established
Evening light exposure from light-emitting screens measured against melatonin timing and sleep onset
In an inpatient crossover trial, reading from a light-emitting device before bed was reported to delay melatonin onset and lengthen time to fall asleep relative to reading a printed book.
Chang AM, Aeschbach D, Duffy JF, Czeisler CA, 2015 · Proceedings of the National Academy of Sciences 112(4):1232–1237

Research — Light & Circadian Rhythm

How to read this

Evening light exposure from light-emitting screens measured against melatonin timing and sleep onset