Evening Blue‑Depleted Lighting in Hospital Wards

Why It Matters For Night Shift Workers and Night Owls

A registered protocol will test how timing and spectrum of light around the end of shift influence sleep & alertness for people who work nights. Unambiguous results would translate ‘better lighting’ into practical timing and spectrum specs for nights. The value for this audience is clarity: what’s measurable about the schedule, and where timing truly matters.