ArticleNature and science of sleep2021
A Blue-Enriched, Increased Intensity Light Intervention to Improve Alertness and Performance in Rotating Night Shift Workers in an Operational Setting.
Article in Nature and science of sleep, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
15 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Impact of artificial light at night on obesity and overweight: a systematic review and meta-analysis.BMC public health · 2025Pooled it
- Improving children's alertness and neuromuscular response by using a blue-enriched white light in the kindergarten playroom.Scientific reports · 2025Trial
- Circadian Biology and Phase Response: Fundamental Mechanisms and Clinical Applications.Clocks & sleep · 2026Review
- Relationships between light exposure and aspects of cognitive function in everyday life.Communications psychology · 2025Article
- Pilot feasibility testing of biomathematical model recommendations for personalising sleep timing in shift workers.Journal of sleep research · 2025Article
- Understanding sleep health challenges of defence shift workers to design a digital, sleep and circadian management tool.Scientific reports · 2025Article
- Moral decision-making at night and the impact of night work with blue-enriched white light or warm white light: a counterbalanced crossover study.Annals of medicine · 2024Article
- Article
- Lighting the path forward: the value of sleep- and circadian-informed lighting interventions in shift work.Sleep · 2024Article
- Current sleep interventions for shift workers: a mini review to shape a new preventative, multicomponent sleep management programme.Frontiers in sleep · 2024Review
- 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
- Chronic blue light-emitting diode exposure harvests gut dysbiosis related to cholesterol dysregulation.Frontiers in cellular and infection microbiology · 2023Article
- Hybrid effectiveness-implementation study of two novel spectrally engineered lighting interventions for shiftworkers on a high-security watchfloor.Sleep advances : a journal of the Sleep Research Society · 2023Article
- Effects of Lighting Interventions to Improve Sleepiness in Night-Shift Workers: A Systematic Review and Meta-Analysis.Healthcare (Basel, Switzerland) · 2022Review
- The photobiology of the human circadian clock.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThis study examined the efficacy of a lighting intervention that increased both light intensity and short-wavelength (blue) light content to improve alertness, performance and mood in night shift workers in a chemical plant. PATIENTS AND
methodsDuring rostered night shifts, 28 workers (46.0±10.8 years; 27 male) were exposed to two light conditions each for two consecutive nights (~19:00-07:00 h) in a counterbalanced repeated measures design: traditional-spectrum lighting set at pre-study levels (43 lux, 4000 K) versus higher intensity, blue-enriched lighting (106 lux, 17,000 K), equating to a 4.5-fold increase in melanopic illuminance (24 to 108 melanopic illuminance). Participants completed the Karolinska Sleepiness Scale, subjective mood ratings, and the Psychomotor Vigilance Task (PVT) every 2-4 hours during the night shift.
resultsA significant main effect of time indicated KSS, PVT mean reaction time, number of PVT lapses (reaction times > 500 ms) and subjective tension, misery and depression worsened over the course of the night shift (p<0.05). Percentage changes in KSS (p<0.05, partial η
conclusionOur findings, showing improvements in alertness and performance with exposure to blue-enriched, increased intensity light, provide support for light to be used as a countermeasure for impaired alertness in night shift work settings.
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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.