Summary
This paper investigates how architectural characteristics—such as window size, building orientation, room geometry, and surface optical properties—determine the light dose received by office workers, with implications for circadian health. It highlights the lack of a standardized method for evaluating circadian lighting effects and calls for predictive tools linking indoor location to illuminance and melanopic EDI levels.
Key Findings
- Key circadian light characteristics identified include spectrum, light levels, spatial pattern, and temporal pattern (duration, timing, and prior exposure history)
- Architectural factors shown to influence circadian light dose include building location/orientation, window dimensions, external obstructions, room geometry, and optical properties of walls and furniture
- Review concludes that no shared, validated method currently exists to evaluate circadian rhythm regulation effects of architectural lighting design
Categories
Sleep & Circadian Health: Paper addresses how architectural and spatial factors affect light dose and consequently melatonin secretion and circadian rhythm regulation.
Workplace Performance: Study focuses specifically on predicting illuminance levels for office workers based on their indoor location.
The Science of Light: Reviews melanopic equivalent daylight illuminance (melanopic EDI) and the interaction between architectural parameters and circadian-effective light metrics.
Author(s)
JJ van Duijnhoven, MCJM Hornikx
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
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
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice