Energy savings from photosensors and occupant sensors/wall switches on a college campus

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ConferenceLux Europa 2009, 11th European Lighting Conference: 09 September 2009, Istanbul, Turkey
Pages731738; # of pages: 8
SubjectLighting controls, energy efficiency, daylighting, occupancy; Energy efficiency; Office lighting
AbstractWe report the savings realized by the use of lighting controls across a college campus in southern Ontario, Canada. The campus had an extensive lighting system of addressable dimming ballasts, controlled and monitored centrally. Of the 2295 luminaires from which we recovered data, 87 were controlled by 62 photosensors; these were in rooms that also featured a manual control system (wall switch/dimmer/preset scenes) and occupancy sensor. The site was monitored from mid-April to mid-July, 2008. Substantial energy savings were realised by the control system, though savings varied greatly by control type, room type, and by day. Manual use of wall switches and switching by occupancy sensors contributed most to savings. Meaningful additional savings were contributed by dimming, either by a photosensor or use of preset scenes. We provide a detailed breakdown of the savings by control and room type. Note that in a large space occupant sensors/wall switches affected all luminaires, whereas photosensors affected only those luminaires close to windows or skylights.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number51319
NPARC number20373790
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Record identifier3d73e696-c813-4a9b-8d6b-10042f9ba7b2
Record created2012-07-23
Record modified2016-05-09
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