Bright Light Treatment During Three Consecutive Night Shifts: Mixed Results in Nurses
Summary
A scheduled bright‑light protocol did not convincingly reduce sleepiness across all measures among nurses working three consecutive night shifts.
Why It Matters For Night Shift Workers and Night Owls
Participants randomized in this trial whether keeping most calories in a daytime window, with minimal overnight intake, showed sleep & alertness for night‑shift workers and night owls. The signal puts timing—rather than only calories or macros—at the center of how bodies respond to working at night. 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
Useful null results when planning lighting changes.