CASE STUDY DUKE UNIVERISTY: durham, nc LEd rE trofit @NeptunLightNews 888.735.8330 www.NeptunLight.com EXISTING SYSTEM: Ñ 175w Metal Halide SOLUTION: Ñ 80w LED LED Acorn Retrofit Lamp THE RESUL TS Metal Halide LED Retrofit r ated Wattage 175w 80w input Wattage 210w 82w Life span 16,000 hrs. 70,000 hrs. no. of f ixtures 1,450 1,450 running t ime/Year 4,380 (12hrs./day) 4,380 (12hrs./day) kWr r ate $0.06 $0.06 a nnual (kWh) 1,333,710 520,782 a nnual (kWh) Savings 812,928 a nnual Energy c osts $80,023 $31,247 Overall annual energy savings = Total savings over life of product = $48,776 $731,635 Project description Duke University is a private research university located in durham, north c arolina. t hey came to Neptun Light, Inc. with the challenge of reducing overall power consumptio

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