Melanopsin
Circadian photopigment peaking near 480nm
Episodes
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#5028: What 670nm Red Light Actually Does for Sleep670nm is a badge, not a mechanism. Here's how to actually shop for a sleep light. -
#5027: The 670nm Sleep Light Myth: What That Number Really MeansThat "670nm" on your sleep light isn't about melatonin at all. It's about copper atoms in your mitochondria — and the dose is probably fictional. -
#2816: Do You Need a Window to Be Happy?Natural light isn't just nice — your brain has a dedicated biological pathway for it. Here's what happens when you take that away.