Supplementation of ambient lighting with a task lamp improves daytime alertness and cognitive performance in sleep-restricted individuals.

ABSTRACT:

Study objectives

We examined the impact of adding a single-high-melanopic-illuminance task lamp in an otherwise low-melanopic-illuminance environment on alertness, neurobehavioral performance, learning, and mood during an 8-h simulated workday.

Methods

Sixteen healthy young adults [mean(±SD) age = 24.2 ± 2.9, 8F] participated in a 3-day inpatient study with two 8-h simulated workdays and were randomized to either ambient fluorescent room light (~30 melanopic EDI lux, 50 lux), or room light supplemented with a light emitting diode task lamp (~250 melanopic EDI lux, 210 lux) in a cross-over design. Alertness, mood, and cognitive performance were assessed throughout the light exposure and compared between conditions using linear mixed models.

Results

The primary outcome

SUBMITTER: Grant LK 

PROVIDER: S-EPMC10424162 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature