ArticleInternational journal of environmental research and public health2021
Access to Daylight at Home Improves Circadian Alignment, Sleep, and Mental Health in Healthy Adults: A Crossover Study.
Article in International journal of environmental research and public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
16 citing papers in PubMed.
- Light exposure and sleep architecture in real-world settings.Npj biological timing and sleep · 2026Article
- The Circadian-Light-Hygiene Hypothesis: A Potential Modulator of Fertility and Birthrate Trends.Biology · 2026Review
- Reframing nature connectedness as a psychosocial mechanism for youth mental health.Frontiers in psychiatry · 2026Review
- Photoinactivation of influenza viruses by modulated indoor daylight spectrum and intensity.Applied and environmental microbiology · 2025Article
- Interaction of daytime and nighttime light exposure on objective sleep quality in patients with bipolar disorder: a cross-sectional analysis of the APPLE cohort.Translational psychiatry · 2025Article
- Tailored light intervention for sleep and cognition in World Trade Center (WTC) cohort.Archives of environmental & occupational health · 2025Article
- The spatial and temporal effect of electrochromic windows on indoor and human microbiome in an inpatient hospital.Antimicrobial stewardship & healthcare epidemiology : ASHE · 2024Article
- A systematic literature review: building window's influence on indoor circadian health.Renewable & sustainable energy reviews · 2023Article
- Sleep and substance use: Practice considerations for social workers.Journal of social work practice in the addictions · 2023Article
- Grand designs for design policy: Associations between apartment policy standards, perceptions of good design and mental wellbeing.SSM - population health · 2022Article
- Can Homes Affect Well-Being? A Scoping Review among Housing Conditions, Indoor Environmental Quality, and Mental Health Outcomes.International journal of environmental research and public health · 2022Article
- A comprehensive evaluation model for the intelligent automobile cockpit comfort.Scientific reports · 2022Article
- Improving Visual Comfort and Health through the Design of a Local Shading Device.International journal of environmental research and public health · 2022Article
- Too Jittery to Sleep? Temporal Associations of Actigraphic Sleep and Caffeine in Adolescents.Nutrients · 2021Article
- Cardiovascular disease and lifestyle choices: Spotlight on circadian rhythms and sleep.Progress in cardiovascular diseasesReview
- Linking Climate Features to Human Life Expectancy in the United States: Implications for Integrated Climate and Health Policies.The journal of climate change and healthArticle
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
As the primary environmental cue for the body's master biological clock, light-dark patterns are key for circadian alignment and are ultimately fundamental to multiple dimensions of health including sleep and mental health. Although daylight provides the proper qualities of light for promoting circadian alignment, our modern indoor lifestyles offer fewer opportunities for adequate daylight exposure. This field study explores how increasing circadian-effective light in residences affects circadian phase, sleep, vitality, and mental health. In this crossover study, 20 residents spent one week in their apartments with electrochromic glass windows and another week with functionally standard windows with blinds. Calibrated light sensors revealed higher daytime circadian-effective light levels with the electrochromic glass windows, and participants exhibited consistent melatonin onset, a 22-min earlier sleep onset, and higher sleep regularity. In the blinds condition, participants exhibited a 15-min delay in dim light melatonin onset, a delay in subjective vitality throughout the day, and an overall lower positive affect. This study demonstrates the impact of daytime lighting on the physiological, behavioral, and subjective measures of circadian health in a real-world environment and stresses the importance of designing buildings that optimize daylight for human health and wellbeing.
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Registered trials
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