Blue‑enriched light to improve alertness on the night shift: randomized trial
Summary
Blue‑enriched white light increased subjective alertness and reduced sleepiness during night shifts compared with standard lighting.
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.
Notes
Hospital ward implementation.