Bright Light Therapy

Bright Light Therapy—often called SAD light therapy—emerged from chronobiology and psychiatry, using structured light exposure to nudge the circadian system toward healthier timing. The approach emphasizes consistent, clock-anchored sessions with broad-spectrum or blue-enriched output. Benefits pursued are a steadier mood, sharper morning alertness, and more reliable sleep-wake rhythms. Many people use it during seasonal dips, jet-lag transitions, shift-work drift, or delayed sleep phase. Programs fine-tune timing, intensity, and duration over weeks to reinforce alignment, daytime energy, and focus without medication. Spectrum choice and cadence evolve with response.