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Light exposure sets your internal sleep clock

Getting outdoor light early and dimming lamps before bed anchors circadian rhythms. Consistent daily light cues trigger predictable hormone releases that regulate sleepiness.

The main principle

Step outside shortly after waking up

Spend ten to twenty minutes outdoors within an hour of waking. Direct sky light signals your brain to stop producing melatonin, even on overcast days.

Morning routine

Lower overhead lights two hours before sleep

Switch off bright ceiling fixtures in the evening and rely on low-level lamps. Reducing blue and white light allows melatonin levels to rise naturally before bedtime.

Evening routine

Consistency matters more than extreme light levels

Shifting light exposure times by several hours on weekends delays your internal clock. Keeping consistent light windows stabilizes sleep latency far more effectively than occasional bright exposure.

What to monitor

Idea

How Light Timing Anchors Your Daily Sleep Cycle

Adjusting morning exposure and evening brightness trains your body clock without medication.

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@spot #sleep #circadian #light #health

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