... for CE,UL,FCC,CQC,ROSH lifespan: 100,000 hours lumen : 80 lm/w wattage 40W ~ 300W ... project lighting, especially for factory, school, exhibition shop, station, port, airport, tunnel, made the real energy-saving. ... Decline Excellent CRILife Hours8000 hrs. ( 1 year @ 24 hrs/Day )( Change 274 Bulbs Every Year )100,000 ... Watts X 24 hours/Day / 1000=1,644 kWh per Day Savings1,644kWh/Day X 365 Days per year= ...