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/44In*e.✓f 6.--/ <br /> LCOST1 2.XLS <br /> Lighting Costs Over 10 Years <br /> Each fixture has four T12 lamps and 2 ballasts <br /> Figures Comments <br /> Area /gsf 100,000 One fixture covers 100 square feet <br /> Number /fixtures 1,000 <br /> Lamp Life 20,000 5 Years @ 4,000 Hrs. /Yr. <br /> Ballast Life 40,000 10 Years @ 4,000 Hrs. /Yr. <br /> Lamp Cost /ea. $1.50 <br /> Ballast Cost lea. $12.00 <br /> Energy Cost /KWH $0.080 <br /> Kilowatt Demand 160 1000 fixtures @160 watts each <br /> Total Kilowatt Hours 6,400,000 10 Years @4000 hrs/yr * Kilowatt Demand <br /> Total Energy Cost $512,000 Kilowatt Hrs. * Cost/kwh (Avg $60,800 Yr) <br /> Total Ballast Cost $44,000 Total Ballast Cost (1 change per 10 years) <br /> Total Lamp Cost $11,000 Total Lamp Cost (Over 10 Years) <br /> Total Cost $567,000 <br /> Energy Cost Percentage 90.30% <br /> Ballast Cost Percentage 7.76% <br /> Lamp Cost Percentage 1.94% <br /> $44,000 $11,000 <br /> = ,""" �► ® Total Energy Cost <br /> r <br /> Hill Total Ballast Cost <br /> 0 Total Lamp Cost . <br /> $512,000 <br /> III <br /> Page 1 <br />