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Outdoor Light Intensity

Meaning

Outdoor Light Intensity refers to the precisely measured brightness of natural, ambient light, which is typically quantified in lux, that an individual is exposed to when positioned outside. This intensity represents an extremely powerful environmental signal that significantly surpasses the lux levels of typical indoor lighting, often by several orders of magnitude. Adequate exposure to this high-intensity outdoor light is recognized as the single most important and primary non-photic regulator of the entire human circadian system.