Summary
This workshop report identifies critical knowledge gaps in daylight research, including uncertainty about optimal daylight quantity and quality for physiological and psychological health, and the lack of standardized measurement tools for real-world light exposure. It calls for interdisciplinary integration to better understand how reduced daylight and increased electric light use in urban environments affect human health and wellbeing, with implications for lighting design standards.
Key Findings
- Three major knowledge gap categories identified: (I) uncertainty about optimal daylight quantity/quality for physiological and psychological functioning, (II) lack of consensus on practical measurement and assessment methods, (III) insufficient interdisciplinary integration of daylight knowledge.
- Daylight undergoes dynamic changes in irradiance and spectral power composition due to latitude, time of day, season, and physical environment features, all of which interact with human biology evolved over millions of years under natural day/night cycles.
- Electric light competes with natural light-dark cycles, with implications for health outcomes in industrialized urban populations who receive substantially less daylight exposure than ancestral norms.
Categories
Sleep & Circadian Health: Reviews gaps in knowledge about daylight's role in circadian entrainment and the health impacts of reduced natural light exposure in urbanized environments.
The Science of Light: Addresses measurement standards, spectral composition of daylight, and the lack of consensus on assessment methods for real-world light exposure monitoring.
Mood & Mental Wellness: Examines consequences of insufficient daylight on psychological functioning and quality of life in industrialized urban settings.
Author(s)
M MĆ¼nch, A Wirz-Justice, SA Brown, T Kantermann
Publication Year
2020
Number of Citations
130
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 twoāprocess 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
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
Mood & Mental Wellness
- The twoāprocess model of sleep regulation: a reappraisal
- Protecting the melatonin rhythm through circadian healthy light exposure
- Effects of artificial dawn and morning blue light on daytime cognitive performance, well-being, cortisol and melatonin levels
- Light therapy and Alzheimer's disease and related dementia: past, present, and future
- Nocturnal light exposure impairs affective responses in a wavelength-dependent manner