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Light Exposure Phase Shifting

Meaning

Light Exposure Phase Shifting is the deliberate use of timed exposure to specific wavelengths of light to advance or delay an individual’s endogenous circadian rhythm. This intervention is a powerful tool for correcting misaligned biological clocks, such as those experienced during jet lag or shift work, or in individuals with Delayed Sleep Phase Syndrome. Precise timing of light exposure acts as a potent zeitgeber to recalibrate the master clock, optimizing the timing of sleep, wakefulness, and hormonal cycles. Effective phase shifting restores systemic synchrony.