Summary
This thesis (in Dutch) explores how light — especially blue short-wavelength light — can be used to enhance alertness and counteract the performance decrements caused by working or being awake at circadian-misaligned times. Practical applications include using targeted lighting interventions during night shifts to reduce errors, improve productivity, and manage chronotype-related scheduling challenges.
Key Findings
- Blue (short-wavelength) light is identified as particularly effective in increasing subjective activation and reducing sleepiness during nighttime wakefulness.
- Individual differences in circadian clock timing (chronotype) make certain people more or less suited for work at specific times of day, suggesting personalized lighting and scheduling strategies.
- Light exposure during night shifts is highlighted as a key countermeasure to fatigue-related errors and accidents, with potential to raise productivity.
Categories
Sleep & Circadian Health: Examines how the biological clock, entrained by light, governs 24-hour rhythms in physiology and behavior, with implications for jet lag, chronotype, and sleep-wake timing.
Shift Work & Staff Wellbeing: Discusses how light exposure, particularly blue/short-wavelength light, can improve alertness and reduce fatigue-related errors during night shift work.
Workplace Performance: Addresses how light-induced increases in alertness can boost productivity and reduce accident risk for workers active during suboptimal circadian phases.
Author(s)
M van de Werken
Publication Year
2013
Related Publications
Sleep & Circadian Health
- Phototransduction by retinal ganglion cells that set the circadian clock
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- The two‐process model of sleep regulation: a reappraisal
- Melanopsin is required for non-image-forming photic responses in blind mice
- Strange vision: ganglion cells as circadian photoreceptors
Shift Work & Staff Wellbeing
- Off the clock: from circadian disruption to metabolic disease
- Endocrine regulation of circadian physiology
- Working against the biological clock: a review for the Occupational Physician
- Shiftwork and light at night negatively impact molecular and endocrine timekeeping in the female reproductive axis in humans and rodents
- Circadian Rhythms Disrupted by Light at Night and Mistimed Food Intake Alter Hormonal Rhythms and Metabolism
Workplace Performance
- Acute alerting effects of light: A systematic literature review
- Effects of artificial dawn and morning blue light on daytime cognitive performance, well-being, cortisol and melatonin levels
- Can light make us bright? Effects of light on cognition and sleep
- Kruithof's rule revisited using LED illumination
- Shining light on memory: Effects of bright light on working memory performance