Shedding More Light on Occupancy

Publication Date: 
09/01/2014

LD+A – Multiple studies have demonstrated the significant energy savings that bi-level, occupancy-based lighting controls can achieve in outdoor applications. These controls maintain recommended illumination levels during occupied periods and automatically dim lights, reducing power by 50 percent or more, during vacant periods.

This article describes the results of initial research conducted by CLTC in partnership with West Coast utilities. Researchers measured occupancy patterns at eight sites in California and Washington State then used the data gathered to determine potential energy savings based on time-out settings and lighting power level during periods when no occupants are detected.


Authors: Thomas Patten, Konstantinos Papamichael, and Nicole Graeber