Awakening effects of blue-enriched morning light exposure on university students' physiological and subjective responses.

ABSTRACT: We investigated physiological and subjective responses to morning light exposure of commercially available LED lighting with different correlated colour temperatures to predict how LED-based smart lighting employed in future learning environments will impact students. The classical markers of the circadian system (melatonin and cortisol), as well as the subjective perception of sleepiness, mood, and visual comfort, were compared. Fifteen university students underwent an hour of morning light exposure to both warm (3,500 K) and blue-enriched (6,500 K) white lights at recommended illuminance levels for classrooms and lecture halls (500 lux). The decline of melatonin levels was significantly greater after the exposure to blue-enriched white light. Exposure to blue-enriched white light signifi

SUBMITTER: Choi K 

PROVIDER: S-EPMC6344573 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature