About

circadian.supply is a directory of gear that changes the light you get and how dark you sleep: sunrise alarms, light therapy lamps, blue-light blockers, red light panels and masks, light meters, circadian bulbs, blackout curtains and sleep masks.

Our starting point is simple: daylight by day and darkness at night do most of the work, and they are free. Outdoor daylight is thousands of lux, far beyond indoor lighting, so the morning sunlight guide comes before any product. Gear is for the gaps, such as dark winter mornings, shift work and bright city bedrooms.

It exists because most “best of” lists for this gear repeat marketing copy. They rarely say whether the product type works, and almost never show the number that matters, such as lux at a distance or irradiance in mW/cm². This site puts that number first and links the research.

Guides are written from primary research, and every claim links to the study it comes from. We are not doctors, and nothing here is medical advice. See the medical disclaimer.

Who runs it

circadian.supply is written and edited by Umar Luqman. A fuller bio is on the way.

How it is funded

Affiliate commissions pay for the site. That never affects grades or rankings. Read the affiliate disclosure and how we grade.

Contact

Corrections, listing requests and everything else go to hello@circadian.supply.