Summary
This simulation study demonstrates that for offices with spectrally neutral or blue-toned surfaces, standard photopic (luminance-based) methods are sufficient to assess circadian lighting adequacy, but spaces with orange or red wall colors require full multi-spectral simulations to accurately predict non-visual light exposure. Lighting designers working with warm-toned interiors cannot rely on conventional illuminance metrics alone to ensure circadian compliance, whereas cooler or neutral palettes allow simpler assessment workflows.
Key Findings
- Photopic methodologies are adequate for assessing non-visual requirements in spaces with spectrally neutral or blue-toned surfaces, but not for orange/red-colored interiors.
- Four cardinal office orientations in Ljubljana, Slovenia were simulated across three sky conditions (clear, hazy, overcast) and three dates (December 21, March 21, June 21), covering the full range of annual conditions.
- Novel metricsāAutonomy of Circadian Potential and Circadian Autonomyāwere introduced to quantify temporal circadian luminous content on a monthly (climate-based spectral month) basis.
- Results indicate that non-visual and visual comfort requirements can conflict in certain interior configurations, particularly those with spectrally active surface colors.
Categories
The Science of Light: Investigates multi-spectral simulation methodologies for predicting non-visual (circadian) luminous content indoors, introducing novel metrics like Autonomy of Circadian Potential and Circadian Autonomy.
Sleep & Circadian Health: Evaluates how indoor surface color and orientation affect circadian light exposure across seasons, directly relevant to entrainment and circadian health in occupied spaces.
Author(s)
J PotoÄnik, M KoÅ”ir
Publication Year
2023
Number of Citations
4
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