Sleep
Morning Sunlight Exposure
Morning sunlight exposure soon after waking sets circadian timing for better night sleep. Outdoor brightness beats typical indoor lighting for this signal.
Morning sunlight exposure within an hour of waking anchors circadian rhythm by signaling the suprachiasmatic clock—outdoor light is brighter than indoor bulbs. Ten to thirty minutes on clear days, longer on overcast, supports earlier melatonin onset at night.
Sunglasses can wait until after the walk if comfortable.
Common questions
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Can a light box replace morning sun?
Bright light therapy boxes help some people in dark winters but outdoor light is ideal when available. Use boxes per clinician guidance if you shift work.
Related terms
Put Morning Sunlight Exposure into practice
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