Viewing bright light (all colors) 10-4am. Bad for sleep, dopamine & more.
We can't find evidence that holds up here. Proponents are reasoning from mechanism or analogy rather than direct human data, and the most credible skeptics raise objections we can't dismiss.
Viewing bright light (all colors) 10-4am. Bad for sleep, dopamine & more.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
that light in the middle of the night reduces dopamine levels to the point where it can start causing problems with learning and memory and mood.
if we view bright lights or even not so bright lights between the hours of 10:00 PM and 4:00 AM, that is strongly disruptive, very disruptive for our dopamine production. It can really screw up our sleep
light in the middle of the night reduces dopamine levels to the point where it can start causing problems with learning and memory and mood.
if we view bright lights or even not so bright lights between the hours of 1000 p.m. and 4:00 a.m., that is strongly disruptive, very disruptive for our dopamine production. It can really screw up our sleep.
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
Sleep regularity predicts all-cause mortality more strongly than sleep duration.
Tracking deep sleep on a wearable accurately reflects EEG-measured slow-wave sleep.
Caffeine has a half-life long enough that consumption after 2pm measurably degrades deep sleep in slow metabolizers.