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Timed light exposure shifts circadian phase
Comprehensive review of light effects on circadian rhythm, demonstrating morning light advances and evening light delays circadian phase through melanopsin pathway.
Phase Response Curve
- Morning light (6-10 AM): phase advance
- Evening light (6-10 PM): phase delay
- Sensitivity peaks at 460-480nm (blue light)
Practical Applications
Morning bright light advances circadian timing for earlier sleep-wake schedules.
Outcomes
- circadian-phase-responseMorning light (6-10AM) phase advances; evening light (6-10PM) phase delays; peak sensitivity at 460-480nm blue light