Cited by 3Circadian rhythm and melatoninTreatment of Major DepressionDigital Mental Health Interventions

Exploring the key parameters for indoor light intervention measures in promoting mental health: A systematic review

Open access
Wang, Chunliang, Su, Kai, Hu, Linming, Wu, Siqing, Zhan, Yiqiang, Yang, Chongguang, Xiang, Jianbang·2024·Indoor Environments

Abstract

Indoor lighting can regulate human mood and sleep, further alleviating mental disorder symptoms. Indoor light intervention (ILI) has been demonstrated as therapeutic for mental disease but lacks standardized guidelines for key parameter settings. This review aims to explore the optimal parameters for widely utilized ILI. We conducted a thorough review of research articles published from 1990 to 2023 in the Web of Science, PubMed, and Scopus databases following the PRISMA guidance. Out of a total of 95728 records, 40 eligible studies were analyzed. We subsequently empirically summarized the ILI’s key parameters (i.e., wavelength, illuminance, and exposure time) into each category and compared the therapeutic effects among different ILI groups within each category. Furthermore, we conducted a multivariate model analysis to identify the optimal parameters further while controlling for confounding factors. Results indicate that ILI was mainly used for treating depressive disorders, accounting for 88% of the included articles. Notably, 450 – 550 nm peak wavelength light exhibited superior therapeutic efficacy compared to other wavelengths. Light illuminance within 2500 – 10000 lux correlated significantly and positively with efficacy. Morning ILI appeared more effective than evening ILI, and the efficacy increased with the number of treatment days. Optimizing light wavelength, illuminance, and exposure time of indoor light intervention can significantly enhance its therapeutic effects on mental illness. Our review provides a fundamental reference for improving the use of indoor light intervention in treating mental disorders and optimizing indoor lighting design for a healthy indoor environment.

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Crossref · 10.1016/j.indenv.2024.100015

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Authors
Wang, C., Su, K., Hu, L., Wu, S., Zhan, Y., Yang, C., & Xiang, J.
Affiliations
Sun Yat-sen University (CN)
Corresponding author
Xiang, Jianbang
Venue
Indoor Environments
Publisher
Elsevier BV
Published
2024-06
Volume
1
Issue
2
Pages
100015
ISSN
2950-3620 (ISSN-L)
OpenAlex
W4394988269
Cited by
2
References
103
Citations by year
2026: 1 · 2025: 1
FWCI
0.11
Type
journal article
Language
en
Open access
Locations
  • Indoor Environments (publishedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex (SCAPC202106)
  • Fundamental Research Funds for the Central Universities
  • Sun Yat-sen University (BZ0344KF21-05, 23hytd005)
  • National Natural Science Foundation of China (RLZY20231001-04)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Social Sciences › Psychology › Applied Psychology › Digital Mental Health Interventions
Keywords
phototherapy, mental health, depression, light wavelength, illuminance, exposure time, circadian timing, interior lighting design, mood regulation, sleep regulation

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