Universität zu Köln

Cajochen, C., Stefani, O., Schoellhorn, I, Lang, D. and Chellappa, S. L. (2022). Influence of evening light exposure on polysomnographically assessed night-time sleep: A systematic review with meta-analysis. Lighting Res. Technol., 54 (6). S. 609 - 625. LONDON: SAGE PUBLICATIONS LTD. ISSN 1477-0938

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Abstract

Evening exposure to electric light can acutely suppress melatonin levels and adversely affect subsequent sleep. We conducted a systematic review with meta-analysis investigating the influence of evening illuminance levels on polysomnographically (PSG)-assessed sleep. We also explored how melanopsin (expressed in melanopic equivalent daylight illuminance (EDI) affects human sleep features. We included polysomnographic laboratory sleep studies with healthy humans for effects of illuminance and exposure duration, for pre-sleep exposures between 6:00 p.m. to 1:00 a.m. From 440 identified articles, 114 met eligibility criteria for screening, and 21 also reported type of light source/spectral characteristics, with 12 identified as eligible for review. Meta-analysis showed evening light affects sleep latency, sleep efficiency and slow wave sleep, with overall effect sizes (95% confidence interval) of 0.69 (-0.50; 1.88), 0.34 (-0.13; 0.82) and -0.61 (-1.85; 0.62), respectively. Estimated melanopic EDI in the range of 100-1000 lx yielded clear dose-response relationships for sleep latency and sleep efficiency, but not for slow wave sleep. Whilst illuminance and duration indicated no apparent effects for a single evening light exposure on PSG-assessed sleep latency, sleep efficiency and slow wave sleep, we observed evidence for a relationship between light exposure and sleep effects based on melanopic EDI. Hence, melanopic EDI may provide a robust predictor of non-visual responses on human sleep.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Cajochen, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stefani, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schoellhorn, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Lang, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chellappa, S. L. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-673851
DOI:	10.1177/14771535221078765
Journal or Publication Title:	Lighting Res. Technol.
Volume:	54
Number:	6
Page Range:	S. 609 - 625
Date:	2022
Publisher:	SAGE PUBLICATIONS LTD
Place of Publication:	LONDON
ISSN:	1477-0938
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHASE RESPONSE CURVE; BRIGHT-LIGHT; CIRCADIAN-RHYTHMS; GANGLION-CELLS; MELATONIN; EEG; TEMPERATURE; ARCHITECTURE; PROPENSITY; ALERTNESS Multiple languages Construction & Building Technology; Optics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67385