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Hybrid effectiveness-implementation study of two novel spectrally engineered lighting interventions for shiftworkers on a high-security watchfloor.
- Source :
- Sleep Advances; 2023, Vol. 4 Issue 1, p1-19, 19p
- Publication Year :
- 2023
-
Abstract
- Shiftwork leads to myriad negative health and safety outcomes. Lighting countermeasures can benefit shiftworkers via physiological effects of light (e.g. alerting, circadian adjustment), and short-wavelength light is the most potent for eliciting those responses; however, limited work indicates it may not be required for alerting. We developed similar-appearing light boxes (correlated color temperature: 3000–3375 K; photopic illuminance: 260–296 lux), enriched (SW+, melanopic EDI: 294 lux) or attenuated (SW-, melanopic EDI: 103 lux) in short-wavelength energy, and implemented them on a high-security watchfloor. Efficacy and feasibility of these two novel lighting interventions were assessed in personnel working 12-hour night shifts (n = 47) in this within-participants, crossover study. For each intervention condition, light boxes were arranged across the front of the watchfloor and illuminated the entire shift; blue-blocking glasses were worn post-shift and before sleep; and sleep masks were used while sleeping. Comparisons between baseline and intervention conditions included alertness, sleep, mood, quality of life (QOL), and implementation measures. On-shift alertness (Karolinska Sleepiness Scale) increased in SW− compared to baseline, while changes in SW+ were more limited. Under SW+, both mood and sleep improved. Psychomotor vigilance task performance did not vary by condition; however, perceived performance and QOL were higher, and reported caffeine consumption and sleep onset latency were lower, under SW−. For both interventions, satisfaction and comfort were high, and fewer symptoms and negative feelings were reported. The addition of spectrally engineered lights to this unique work environment improved sleep, alertness, and mood without compromising visual comfort and satisfaction. This paper is part of the Sleep and Circadian Rhythms: Management of Fatigue in Occupational Settings Collection. [ABSTRACT FROM AUTHOR]
- Subjects :
- SHIFT systems
SLEEP quality
STATISTICS
WORK environment
AFFECT (Psychology)
SLEEP latency
HUMAN comfort
CIRCADIAN rhythms
PSYCHOLOGY of movement
ACTIGRAPHY
SATISFACTION
HUMAN services programs
TREATMENT effectiveness
COMPARATIVE studies
EMPLOYEES
LIGHT
DESCRIPTIVE statistics
CHI-squared test
WAVE analysis
QUALITY of life
CAFFEINE
PHOTORECEPTORS
QUESTIONNAIRES
RESEARCH funding
DATA analysis software
DATA analysis
WAKEFULNESS
DROWSINESS
EVALUATION
Subjects
Details
- Language :
- English
- Volume :
- 4
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Sleep Advances
- Publication Type :
- Academic Journal
- Accession number :
- 174979199
- Full Text :
- https://doi.org/10.1093/sleepadvances/zpad051