... Osram,Bridgelux,Edison,EpistarPS:MMInput voltage:12/24V/85-265V;50-60HZGW:KGManufacture Experience:6yearsLife span:50000hrsBeam angle:15/25/ ... cooling method 2,see the power supply(commonly known as transformer):Transformer determines the life of lamp,lamp beads with more ... together with the design determine the efficiency of the transformer,also power factor,stability,temperature rise and life Users ...