Summary
This paper critically evaluates current daylighting metrics used in building standards and finds them inadequate when compared to emerging metrics from electric lighting research, including circadian-relevant measures. A new daylight adequacy metric is proposed to better align daylighting standards with both visual and non-visual (e.g., circadian) benefits for building occupants.
Key Findings
- Existing daylighting metrics (e.g., daylight factor, illuminance levels) do not adequately capture the full range of benefits daylight provides, including circadian health and wellbeing.
- A new metric for daylight adequacy is proposed that draws on developments in electric lighting standards, potentially bridging the gap between daylighting guidance and circadian-informed lighting design.
- The paper highlights a disconnect between current regulatory metrics and the biological and perceptual needs of building occupants.
Categories
The Science of Light: Proposes a new metric for daylight adequacy and critically compares existing daylighting metrics against emerging standards from electric lighting science.
Sleep & Circadian Health: Discusses the implications of daylight adequacy metrics in the context of circadian-relevant lighting in buildings.
Author(s)
PJ Raynham
Publication Year
2015
Number of Citations
1
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