Light, Alertness, and Alerting Effects of White Light: A Literature Overview

Light is known to elicit non–image-forming responses, such as effects on alertness. This has been reported especially during light exposure at night. Nighttime results might not be translatable to the day. This article aims to provide an overview of (1) neural mechanisms regulating alertness, (2) wa...

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Veröffentlicht in:Journal of Biological Rhythms 2018-12, Vol.33 (6), p.589-601
Hauptverfasser: Lok, Renske, Smolders, Karin C. H. J., Beersma, Domien G. M., de Kort, Yvonne A. W.
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container_end_page 601
container_issue 6
container_start_page 589
container_title Journal of Biological Rhythms
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creator Lok, Renske
Smolders, Karin C. H. J.
Beersma, Domien G. M.
de Kort, Yvonne A. W.
description Light is known to elicit non–image-forming responses, such as effects on alertness. This has been reported especially during light exposure at night. Nighttime results might not be translatable to the day. This article aims to provide an overview of (1) neural mechanisms regulating alertness, (2) ways of measuring and quantifying alertness, and (3) the current literature specifically regarding effects of different intensities of white light on various measures and correlates of alertness during the daytime. In general, the present literature provides inconclusive results on alerting effects of the intensity of white light during daytime, particularly for objective measures and correlates of alertness. However, the various research paradigms employed in earlier studies differed substantially, and most studies tested only a limited set of lighting conditions. Therefore, the alerting potential of exposure to more intense white light should be investigated in a systematic, dose-dependent manner with multiple correlates of alertness and within one experimental paradigm over the course of day.
doi_str_mv 10.1177/0748730418796443
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subjects Alertness
Correlation analysis
Daytime
Exposure
Light
Luminous intensity
Reviews
White light
title Light, Alertness, and Alerting Effects of White Light: A Literature Overview
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