What 670nm Red Light Actually Does for Sleep

You've seen "670nm" on every red light listing, but what does that number actually mean for sleep? We trace its real origin — not a sleep lab, but photobiomodulation research — and explain why the number matters less than you think. Then we get practical: the spectral chart, the dimming floor, and the driver specs that separate a real sleep light from marketing. If you've ever wondered whether you're buying a serious tool or an expensive red bulb, this episode is for you. Episode #893876 — open it directly at myweirdprompts.com/893876