Skip to main content

Light Exposure Thresholds

Meaning

Light exposure thresholds represent the minimum intensity, duration, and specific wavelength characteristics of light required at particular times of day to effectively trigger or suppress key hormonal and neurobiological responses, primarily related to the circadian rhythm. Clinically, these thresholds are crucial for prescribing light-based interventions to regulate the sleep-wake cycle, optimize nocturnal melatonin secretion, and ensure proper synchronization of the body’s master clock. Falling below or exceeding these critical thresholds at inappropriate times can lead to profound circadian disruption and subsequent hormonal imbalance.