Light of both high and low melanopic illuminance improves alertness and attention during daytime.

ABSTRACT: Light exposure during the day exerts acute effects on attention, such as how alert and ready a person is for solving problems and goal-oriented behavior. However, to increase the understanding of how different light conditions during daytime affect our attention, there is a need for more studies. The current study, using a sample of healthy, young adults (N = 39; 21.7 ± 2.6 y, 61.5% female), tested the acute effects of morning exposure (09:00-11:00) to four artificial lights on attention and alertness with the Psychomotor Vigilance Task (PVT). The PVT was administered three times in short-wavelength "blue" light [SWL, high melanopic illuminance], long-wavelength "red" light [LWL, low melanopic illuminance], and bright white light [BWL] of high correlated color temperature, and white dim li

SUBMITTER: Bjerrum LB 

PROVIDER: S-EPMC12749685 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature