... years warranty 4, lifespan: 50,000 hours 3*1W LED DriverSpecification Model No. HG-LC-3*1W Size 26X17X17mm Power ... Output Voltage 9.6~10.8V Power Factor 0.6 Efficiency 78% Applications GU, B22, E27Features:1)80~90% ... is -20~60degree Celsius, body temp. less than 538) LED life span: 30, 000Hours(Edison); 50, 000 Hours(Cree) ... for museums, art galleries, cosmetic counters, and more. 3W LED Driver