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Use of Occupancy Sensors in LED Parking Lot and Garage Applications

Occupancy sensor (motion detection) systems are gaining traction as an effective technological approach to reducing energy use in exterior commercial lighting applications. Done correctly, occupancy sensors can substantially enhance the savings from an already efficient lighting system. However, this technology is confronted by several potential challenges and pitfalls that can leave a significant amount of the prospective savings on the table. This report describes actual experiences from field installations of occupancy sensor controlled lightemitting diode (LED) lighting at two parking structures and two parking lots. The relative levels of success at these installations reflect a marked range of potential outcomes—from an additional 76% in energy savings (i.e., after those gained by the initial conversion to LED) to virtually no additional savings (Table S.1).

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