Abstract
Abstract : This report documents a solid-state lighting technology demonstration at the Naval Surface Warfare Center (NSWC), Carderock Division in West Bethesda, MD where lightemitting diode (LED) luminaires were substituted for existing High Pressure Sodium (HPS) street lighting units, and an intelligent lighting control system was deployed to allow additional energy savings. The demonstration results show average electricity savings of 74% with the conversion of HPS to the demonstrated LED street lighting system. The annual electricity savings of the LED as compared to its HPS counterparts were recorded at 11,060 kWh, which can be translated to avoided CO2 emission savings of 16,081 lbs during the same period. The new LED-based system is expected to pay back its investment within 6 years with the adjusted internal rate of return of 9.77%. Staff at the Naval Surface Warfare Center (NSWC), Carderock Division, reported high satisfaction with the light quality and operation of the newly installed LED street lighting system.
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