Skip to main content

Photonic Dose Response

Meaning

The quantifiable relationship between the intensity, duration, and spectral quality of light exposure (the photonic “dose”) and the resulting physiological or hormonal change (the “response”). This principle applies primarily to nonvisual effects, such as the suppression of nocturnal melatonin or the phase-shifting of the circadian clock. Clinically, establishing the appropriate photonic dose is essential for using light therapy to correct circadian misalignment, optimize sleep, and enhance daytime alertness. The biological effect is highly dependent on precise light characteristics.