ArticleProceedings of the National Academy of Sciences of the United States of America2023
Associations between light exposure and sleep timing and sleepiness while awake in a sample of UK adults in everyday life.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.
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
38 citing papers in PubMed, 1 synthesis or guideline pooled it, 74 citations in OpenAlex.
- Ocular light and optical radiation exposure as a modifiable environmental determinant of health: expert consensus on research gaps and priorities.BMC medicine · 2026Guideline
- The bright and dark side of blue-enriched light on sleep and activity in older adults.GeroScience · 2025Trial
- Daily associations between the physical environment and sleep among a diverse, national sample of young adults.Sleep health · 2026Article
- SEX-DEPENDENT MODULATION OF WHOLE BRAIN cFOS EXPRESSION BY LIGHT AND MELANOPSIN IN THE MOUSE.bioRxiv : the preprint server for biology · 2026Article
- Photoreceptor-specific scene statistics reveal melanopic structure in natural environments.iScience · 2026Article
- Light exposure and sleep architecture in real-world settings.Npj biological timing and sleep · 2026Article
- Therapeutic prospects of bright light therapy in addictive disorders: a scoping review.Journal of neural transmission (Vienna, Austria : 1996) · 2026Article
- Associations between habitual light exposure-related behaviors and sleep timing and sleep complaints in an international community sample.Scientific reports · 2026Article
- Article
- Evaluating chest-worn light logger adherence: development and application of a wear/non-wear model.Scientific reports · 2026Article
- Impact of wear position on dosimeter performance: measurement validity under simulated indoor illumination.Npj biological timing and sleep · 2026Article
- Impact of wear position on dosimeter performance: a hybrid measurement-simulation approach to quantify in-situ factors.Npj biological timing and sleep · 2026Article
- Auxiliary data, quality assurance and quality control for wearable light loggers and optical radiation dosimeters.Npj biological timing and sleep · 2026Article
- Patterns of smartphone typing performance by time awake: implications for unobtrusive ambulatory mental fatigue assessment.PLOS digital health · 2026Article
- Physiologically-relevant light exposure and light behaviour in Switzerland and Malaysia.Journal of exposure science & environmental epidemiology · 2026Observational
- Simulated natural daylight and twilight modulate activity and light sampling behaviour in mice.BMC biology · 2026Article
- Collecting, detecting, and handling non-wear intervals in longitudinal light exposure data.Behavior research methods · 2026Article
- Relationships between light exposure and aspects of cognitive function in everyday life.Communications psychology · 2025Article
- Dim light at night impacts circadian rhythms and Alzheimer's disease-like neuroinflammation and neuropathology in humanized APP SAA knock-in mice.bioRxiv : the preprint server for biology · 2025Article
- How to Deal With Darkness: Modeling and Visualization of Zero-Inflated Personal Light Exposure Data on a Logarithmic Scale.Journal of biological rhythms · 2025Article
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Authors and funding
8 authors at 3 institutions in 2 countries.
Funding
Abstract
Experimental and interventional studies show that light can regulate sleep timing and sleepiness while awake by setting the phase of circadian rhythms and supporting alertness. The extent to which differences in light exposure explain variations in sleep and sleepiness within and between individuals in everyday life remains less clear. Here, we establish a method to address this deficit, incorporating an open-source wearable wrist-worn light logger (SpectraWear) and smartphone-based online data collection. We use it to simultaneously record longitudinal light exposure (in melanopic equivalent daylight illuminance), sleep timing, and subjective alertness over seven days in a convenience sample of 59 UK adults without externally imposed circadian challenge (e.g., shift work or jetlag). Participants reliably had strong daily rhythms in light exposure but frequently were exposed to less light during the daytime and more light in pre-bedtime and sleep episodes than recommended [T. M. Brown
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.