Lighting Interventions and Sleepiness in Night‑Shift Workers: Meta‑analysis
Summary
Across 14 studies, lighting interventions—especially blue‑enriched light >5000 K—significantly improved sleepiness in night‑shift workers.
Why It Matters For Night Shift Workers and Night Owls
Pooled evidence how timing and spectrum of light on shift versus before daytime sleep shows sleep & alertness for night‑shift workers and night owls. Together with other trials, it frames light as a measurable lever for on‑shift alertness and next‑day sleep, not just ambience. For people who work nights, that frames an everyday choice (when you eat, how you light the end of a shift, how rest is split) as part of the mechanism, not just routine.
Notes
Includes multi‑country trials; practical parameters.