... Excellent CRILife Hours8000 hrs. ( 1 year @ 24 hrs/Day )( Change 274 Bulbs Every Year )100,000 hrs. (10 years @ 24 hrs ... Sets274 Sets Energy and Related Cost Savings: ( 460W – 210W ) X 274 Fixtures=68,500Watts68,500 Watts X 24 hours/Day / 1000 ... X .11 rate=$66,000.00/Year Energy Cost SavingsPlus: 274 Lamps X $30.03ea.=$8,229.00/Year in Replacement ...