Recommendations for Healthy Daytime, Evening, and Night-Time Indoor Light Exposure

Timothy Brown; George Brainard; Christian Cajochen; Charles Czeisler; John Hanifin; Steven Lockley; Robert Lucas; Mirjam Munch; John O'Hagan; Stuart Peirson; Luke Price; Till Roenneberg; Luc Schlangen; Debra Skene; Manuel Spitschan; Celine Vetter; Phyllis Zee; Kenneth Wright Jr.

doi:10.20944/preprints202012.0037.v1

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preprints.org > biology and life sciences > anatomy and physiology > doi: 10.20944/preprints202012.0037.v1

Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Recommendations for Healthy Daytime, Evening, and Night-Time Indoor Light Exposure

^* ,

Version 1 : Received: 30 November 2020 / Approved: 1 December 2020 / Online: 1 December 2020 (16:06:08 CET)

A peer-reviewed article of this Preprint also exists.

Brown TM, Brainard GC, Cajochen C, Czeisler CA, Hanifin JP, Lockley SW, et al. (2022) Recommendations for daytime, evening, and nighttime indoor light exposure to best support physiology, sleep, and wakefulness in healthy adults. PLoS Biol 20(3): e3001571. https://doi.org/10.1371/journal.pbio.3001571 Brown TM, Brainard GC, Cajochen C, Czeisler CA, Hanifin JP, Lockley SW, et al. (2022) Recommendations for daytime, evening, and nighttime indoor light exposure to best support physiology, sleep, and wakefulness in healthy adults. PLoS Biol 20(3): e3001571. https://doi.org/10.1371/journal.pbio.3001571

Abstract

Ocular light exposure has important influences on human health and well-being through modulation of circadian rhythms and sleep, as well as neuroendocrine and cognitive functions. Current patterns of light exposure do not optimally engage these actions for many individuals, but advances in our understanding of the underpinning mechanisms and emerging lighting technologies now present opportunities to adjust lighting to promote optimal physical and mental health and performance. A newly developed, SI-compliant standard provides a way of quantifying the influence of light on the intrinsically photosensitive, melanopsin-expressing, retinal neurons that mediate these effects. The present report provides recommendations for lighting, based on an expert-scientific consensus and expressed according to this new measurement standard. These recommendations are supported by a comprehensive analysis of the sensitivity of human ‘non-visual’ responses to ocular light, are centred on an easily measured quantity (melanopic equivalent daylight (D65) illuminance), and provide a straightforward framework to inform lighting design and practice.

Keywords

light; circadian; melatonin

Subject

Biology and Life Sciences, Anatomy and Physiology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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