Light & Circadian Rhythm

Using morning sunlight, evening darkness and light timing to anchor your body clock.

Complete guide How Does Light Affect Your Circadian Rhythm? A Practical Guide Light is the strongest signal for your body clock. Learn how morning light, evening dimming and darkness at night shape sleep timing and alertness.

Protocols & questions

How Long Should You Get Morning Sunlight?
A simple morning sunlight routine: get outdoors within an hour of waking for roughly 10 to 30 minutes, longer on overcast days.

Updated October 8, 2026 Sample