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This piece is part of The Luna Journal — field notes from the team building a softer light for the hours after dark. The full article is on its way; in the meantime, subscribe to the Sunday letter and we'll send it the moment it goes up.
SCIENCE
A short field guide to ipRGCs, melatonin, and the wavelength that runs your sleep — without the supplement-store pseudoscience.
FIELD NOTES
Observatories have used deep red light since the 1940s. The reasoning is older — and it's the entire technical foundation of Luna.
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