... :Epistar,Bridgelux. 3.life:35000h, 4.CE,RoHs 250Lm bulbs AC-100-240V 4W Items Technical Characteristics Input VoltageAC100V - 240V , ... frequency 2.High power factor and conversion efficiency 3.Fast switch response, no delay, no flickering--- Illumination features: 1.High ... on. In case of any abnormal phenomenon or problem, please switch off the power supply then contact with Genice customer service ...