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The Lighting Environment, Its Metrology, and Non-visual Responses
Luc J M Schlangen1, Luke L A Price2
1Department Human-Technology Interaction, Intelligent Lighting Institute, Eindhoven University of Technology, Eindhoven, Netherlands.
Frontiers in Neurology
|March 22, 2021
Summary
The CIE S 026 standard offers a new way to measure light
Area of Science:
- Chronobiology and Photobiology
- Human Health and Lighting
Background:
- International standard CIE S 026:2018 provides a method to characterize light exposures for non-visual photoreception.
- This standard defines five spectral sensitivity functions for five α-opic retinal photoreceptor classes influencing human non-visual responses via intrinsically-photosensitive retinal ganglion cells (ipRGCs).
- The CIE also released an open-access α-opic toolbox for calculating these quantities.
Purpose of the Study:
- To apply the new CIE S 026 α-opic metrology to everyday light sources.
- To explore how variations in melanopic content of light can support human health and well-being.
Main Methods:
- Utilized the CIE S 026 standard and its associated α-opic toolbox.
- Applied the metrology to analyze a natural daylight time series, various LED lighting products, and a smartphone display screen.
Main Results:
- Demonstrated the application of α-opic metrology to diverse light sources.
- Provided examples suggesting strategies for using light variations to support human health.
Conclusions:
- The CIE S 026 metrology enables traceable measurements and quantitative specification of light exposures.
- Variations in melanopic content of light can be leveraged in strategies to promote human health and well-being.
