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047INCMH.XLS <br /> $y Qt► Carmichael Gymnasium(s) /Lighting Retrofit <br /> 'l, i from Incandescent to Metal Halide <br /> Case Study <br /> Removed 141,Incandescent luminaires totalling 106 KW <br /> and replaced with 60, Metal Halide luminaires totaling <br /> ,nr 27.6 KW. Electrical demand was reduced by 78 KW <br /> with an estimated annual saving of$15,755. All work was <br /> lcal 0' <br /> performed by physical plant personnel including both <br /> design and installation. <br /> Energy Profile <br /> Original System/Incandescent New System/Metal Halide <br /> Cost per KWH $0.08 Cost per KWH $0.08 <br /> Daily Hours/Operation 8 Daily Hours/operation 8 <br /> Days per Year/Operation 300 Days per Year/Operation 300 <br /> Annual Hours/Operation 2,400 Annual Hours/Operation 2400 <br /> Number of Luminaires 141 Number of Luminaires 60 <br /> Lamp Wattage 750 Lamp Wattage Each • 400 <br /> Ballast Wattage 0 Ballast Wattage Each 60 <br /> Total KWD 105.8 Total KWD 27.6 <br /> Annual KWH 253,800 Annual KWH 66,240 <br /> Annual Energy Cost $21,319 Annual Energy Cost $5,564 <br /> Net Annual Savings $15,755 <br /> Implementation Cost $30,000 Estimate Number,0145-0. <br /> Payback/Years 1.90 <br /> Internal Rate of Return 53% <br /> Ili <br /> Energy Investments that Beat the DOW <br />