... , Efficient constant-current drive circuit, The conversion>90%, In the same conditions, the brightness of 5W LED light bulb is equivalent ... maintenance and management.3,Electrical stability:Led bulb , AC85V-AC265V 50/60Hz, The wide voltage and frequency input, without strobo ... of frequent turn on/off and great voltage fluctuation range4,Environment-Friendly: Led bulb,Waste materials can be recycled, No ...