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Light Dose Lux Measurement

Meaning

The precise quantification of the intensity of visible light exposure received by the eye, expressed in lux, which is a key metric in chronobiology and sleep medicine. This measurement is critical because the non-visual effects of light on the circadian system are dose-dependent, requiring a specific minimum intensity for phase shifting or melatonin suppression. Clinically, it is used to prescribe the exact Light Dose necessary for an Early Morning Light Protocol or to identify insufficient daytime light exposure that contributes to Systemic Rhythm Misalignment. Accurate measurement ensures the therapeutic efficacy of light interventions.