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.
Right, yeah, any light will affect the system to some extent, the blue light is somewhat more effective, but don't fool yourself into thinking that if you use red light that means you're avoiding the effect, it's certainly still there. And certainly, if it's very bright, it'll be more effective in driving the system than dim blue light would be.
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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.
we do want to minimize the blue light because that's what's suppressing uh the melatonin and we want melatonin when we're getting ready for bed this helps us sleep and repair
They also contain a lot of blue light, so they're going to interfere with your sleep and your circadian rhythm.
but of that light if there is a better form of light it's the red and the yellow the very warm kind of colors the cold blue light that comes from LED that's the more deleterious light that's the type of light that is more detrimental
it's the blue light that is most harmful to melatonin so light in general not great for melatonin it will stamp the brakes on melatonin and it will stop releasing it so your brain is fooled into thinking it's still daytime even though it's actually on the clockface night time
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.