Blue-Enriched Morning Light as a Countermeasure to Light at the Wrong Time: Effects on Cognition, Sleepiness, Sleep, and Circadian Phase
In addition to making you more alert during the day, improving your mood and sleep, the blue in bright morning sunlight acts as a countermeasure or antidote to some of the damaging health effects of artificial light at night.
It doesn’t give you a free pass to use artificial light at night without bad health effects, but it reinforces your circadian system so that exposure to a blast of artificial light at night doesn’t hurt you as much.
