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/114e,A rMA.i r E' <br /> LCOST8.XLS <br /> Lighting Costs Over 10 Years <br /> Each fixture has four T8 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 lea. $2.25 <br /> Ballast Cost /ea. $20.00 <br /> Energy Cost /KWH $0.080 <br /> Kilowatt Demand 120 1000 fixtures @120 watts each <br /> Total Kilowatt Hours 4,800,000 10 Years @4000 hrs/yr * Kilowatt Demand <br /> Total Energy Cost $384,000 Kilowatt Hrs. * Cost/kwh (Avg $60,800 Yr) <br /> Total Ballast Cost $60,000 Total Ballast Cost (1 change per 10 years) <br /> Total Lamp Cost $14,000 Total Lamp Cost (Over 10 Years) <br /> Total Cost $458,000 <br /> Energy Cost Percentage 83.84% <br /> Ballast Cost Percentage 13.10% <br /> Lamp Cost Percentage 3.06% <br /> $14,000 <br /> $60,000 <br /> ll�1IIIIIIII11:11 <br /> iIiil Total Energy Cost <br /> I 11111 Total Ballast Cost <br /> "L""` _ - fl Total Lamp Cost <br /> ...:,.: t :..... <br /> $384,000 <br /> Page 1 <br />