Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Evaluating the use of photobiology-driven alertness and health measures for circadian lighting design

Athina Ji-Hae Alight, J. Alstan Jakubiec
University of Toronto, John H. Daniels Faculty of Architecture, Landscape, and Design, Toronto, Canada

Abstract: We compare a new, novel lighting design workflow based on human photobiology with existing metrics for nonvisual lighting design. There are a variety of light simulation methods and a lineage of circadian system biological models, but they are not connected into a cohesive workflow. We applied this novel workflow to two design variables: window spectral transmittance and surface reflectance. This article reviews and compares existing frameworks of circadian design to our novel workflow in terms of material spectrum sensitivity and the resulting evaluation of architecture in terms of circadian health. Our results highlight how architectural design can directly impact an occupant’s circadian health. Our comparative analyses demonstrates how direct photobiology-driven alertness and health metrics differ from previous circadian design metrics.
Keywords: daylighting, circadian lighting, non-visual effects, design process
Pages: 2529 - 2537