Overview
Viewing bright sunlight (10,000+ lux) within 30-60 minutes of waking triggers a cortisol pulse that sets the circadian clock. This starts the timer for melatonin release ~12-14 hours later, anchoring your sleep-wake cycle.
Health Goals Impacted 1
This item supports, tracks, or is required for the following health goals:
Anchors the circadian rhythm.
The most powerful intervention for sleep happens in the morning. Sunlight hitting the retina (specifically the intrinsically photosensitive retinal ganglion cells) tells the brain "it is day," setting the countdown for tonight's melatonin release.
Without this strong morning signal, your circadian clock drifts, leading to "social jetlag" where you feel tired in the morning and wired at night.