Randomized controlled trial of blue‑enriched light to improve alertness and performance in night shift workers

Why It Matters For Night Shift Workers and Night Owls

This RCT how timing and spectrum of light on shift versus before daytime sleep showed 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.