Andrew Huberman· PhD
understand light in the early part of the day is valuable. Light when you want to be awake, provided it's not so bright it's damaging.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
understand light in the early part of the day is valuable. Light when you want to be awake, provided it's not so bright it's damaging.
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.
I don't think being exposed to bright light in the day is going to ever be bad because really if you're outside in the day...
Understand, light in the early part of the day is valuable. Light when you want to be awake, provide it's not so bright, it's damaging. It's great for you, whether or not it comes from screens or sunlight, but sunlight is better.
+ wake up, light in eyes
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.