The evening light environment in hospitals can be designed to produce less disruptive effects on the circadian system and improve sleep.

ABSTRACT:

Study objectives

Blue-depleted lighting reduces the disruptive effects of evening artificial light on the circadian system in laboratory experiments, but this has not yet been shown in naturalistic settings. The aim of the current study was to test the effects of residing in an evening blue-depleted light environment on melatonin levels, sleep, neurocognitive arousal, sleepiness, and potential side effects.

Methods

The study was undertaken in a new psychiatric hospital unit where dynamic light sources were installed. All light sources in all rooms were blue-depleted in one half of the unit between 06:30 pm and 07:00 am (melanopic lux range: 7-21, melanopic equivalent daylight illuminance [M-EDI] range: 6-19, photopic lux range: 55-124), whereas the other had standard lightin

SUBMITTER: Vethe D 

PROVIDER: S-EPMC7953207 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature