ArticleJournal of biological rhythms2018
Investigation of Dose-Response Relationships for Effects of White Light Exposure on Correlates of Alertness and Executive Control during Regular Daytime Working Hours.
Article in Journal of biological rhythms, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
19 citing papers in PubMed, 1 synthesis or guideline pooled it, 82 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
- Daytime melatonin and light independently affect human alertness and body temperature.Journal of pineal research · 2019Trial
- Cortical excitability is affected by light exposure - Distinct effects in adolescents and young adults.Neurobiology of sleep and circadian rhythms · 2026Article
- Light of both high and low melanopic illuminance improves alertness and attention during daytime.Scientific reports · 2025Article
- Towards an evidence-based integrative lighting score: a proposed multi-level approach.Annals of medicine · 2024Review
- Article
- Associations between light exposure and sleep timing and sleepiness while awake in a sample of UK adults in everyday life.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Light as a Modulator of Non-Image-Forming Brain Functions-Positive and Negative Impacts of Increasing Light Availability.Clocks & sleep · 2023Review
- Objective Measures of Immediate "Energizing" Effect of Light: Studies Review and Data Analysis.Clocks & sleep · 2022Review
- The modified German subjective vitality scale (SVS-GM): Psychometric properties and application in daily life.Frontiers in psychology · 2022Article
- Guiding principles for determining work shift duration and addressing the effects of work shift duration on performance, safety, and health: guidance from the American Academy of Sleep Medicine and the Sleep Research Society.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2021Article
- Temporal Dynamics of Subjective and Objective Alertness During Exposure to Bright Light in the Afternoon for 5 h.Frontiers in physiology · 2021Article
- Article
- Does Bright Light Counteract the Post-lunch Dip in Subjective States and Cognitive Performance Among Undergraduate Students?Frontiers in public health · 2021Article
- Effect of Indoors Artificial Lighting Conditions on Computer-Based Learning Performance.International journal of environmental research and public health · 2020Article
- The Role of Daylight for Humans: Gaps in Current Knowledge.Clocks & sleep · 2020Article
- Living in Biological Darkness: Objective Sleepiness and the Pupillary Light Responses Are Affected by Different Metameric Lighting Conditions during Daytime.Journal of biological rhythms · 2019Article
- Light, Alertness, and Alerting Effects of White Light: A Literature Overview.Journal of biological rhythms · 2018Review
- White Light During Daytime Does Not Improve Alertness in Well-rested Individuals.Journal of biological rhythms · 2018Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
To date, it is largely unknown which light settings define the optimum to steer alertness and cognitive control during regular daytime working hours. In the current article, we used a multimeasure approach combined with a relatively large sample size ( N = 60) and a large range of intensity levels (20-2000 lux at eye level) to investigate the dose-dependent relationship between light and correlates of alertness and executive control during regular working hours in the morning and afternoon. Each participant was exposed to a single-intensity light level for 1 h after a 30-min baseline phase (100 lux at the eye) in the morning and afternoon (on separate days) during their daily routine. Results revealed no clear dose-dependent relationships between 1-h daytime light exposure and correlates of alertness or executive control. Subjective correlates showed only very modest linear relationships with the log-transformed illuminance, and we found no significant effects of light intensity on the behavioral and physiological indicators. Overall, these results suggest that daytime exposure to more intense light, at least for 1 h of exposure, may not systematically benefit alertness or executive functioning. However, future research is required to investigate effects of longer exposure durations and potential moderations by prior light exposure, personal characteristics, and spectrum.
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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.