DOLED Issues Gateway Report on Parking Garages

At the parking structure of the U.S. Department of Labor headquarters in Washington, D.C., LED luminaires were installed in place of the incumbent high-pressure sodium (HPS) luminaires and evaluated for relative light quantity and performance. Results showed energy savings of 52% from the initial conversion of HPS to LED—which increased to 88% by using occupancy sensor controls—and simple payback periods of 6.5 and 4.9 years for retrofit and new construction scenarios, respectively. Read more.