TY - JOUR
T1 - Lighting application efficacy
T2 - A framework for holistically measuring lighting use in buildings
AU - Durmus, Dorukalp
AU - Hu, Wenye
AU - Davis, Wendy
N1 - Publisher Copyright:
Copyright © 2022 Durmus, Hu and Davis.
PY - 2022/8/26
Y1 - 2022/8/26
N2 - Lighting consumes significant energy in buildings, but current measurements of lighting efficiency are inadequate in capturing the spatial and temporal effectiveness of light. The most widely used lighting energy efficiency measure, luminous efficacy, quantifies the amount of light generated by individual light sources. While luminous efficacy provides manufacturers and designers with a useful metric for quantifying the energy efficiency of individual lighting devices, it does not fully address the use of lighting in architectural spaces. Instead, application efficacy, the relationship between the electrical power consumed by lighting hardware and the amount of light that contributes to the visual perception of building occupants, must be measured. Here, we propose a framework for calculating lighting application efficacy (LAE) based on the primary pathway of light in architectural settings: the generation and emission of light from a luminaire, the travel of the light throughout the space and into occupants’ eyes, and the process of visual perception. The LAE framework will include the development of computational methods for estimating the proportion of emitted light that is directed to task areas and areas corresponding to occupants’ visual fields using ray-tracing lighting design software. Future modeling and validation work will quantify energy efficiency of buildings.
AB - Lighting consumes significant energy in buildings, but current measurements of lighting efficiency are inadequate in capturing the spatial and temporal effectiveness of light. The most widely used lighting energy efficiency measure, luminous efficacy, quantifies the amount of light generated by individual light sources. While luminous efficacy provides manufacturers and designers with a useful metric for quantifying the energy efficiency of individual lighting devices, it does not fully address the use of lighting in architectural spaces. Instead, application efficacy, the relationship between the electrical power consumed by lighting hardware and the amount of light that contributes to the visual perception of building occupants, must be measured. Here, we propose a framework for calculating lighting application efficacy (LAE) based on the primary pathway of light in architectural settings: the generation and emission of light from a luminaire, the travel of the light throughout the space and into occupants’ eyes, and the process of visual perception. The LAE framework will include the development of computational methods for estimating the proportion of emitted light that is directed to task areas and areas corresponding to occupants’ visual fields using ray-tracing lighting design software. Future modeling and validation work will quantify energy efficiency of buildings.
UR - http://www.scopus.com/inward/record.url?scp=85138005192&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85138005192&partnerID=8YFLogxK
U2 - 10.3389/fbuil.2022.986961
DO - 10.3389/fbuil.2022.986961
M3 - Article
AN - SCOPUS:85138005192
SN - 2297-3362
VL - 8
JO - Frontiers in Built Environment
JF - Frontiers in Built Environment
M1 - 986961
ER -