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There are two main types of drivers, those that use low voltage DC input power (generally 5-36VDC) and those that use high voltage AC input power (generally 90-277VAC). These figures are obtained by dividing the rectified 310V DC (from 220V AC) by the forward voltage of the LED. Pros: - consistent LED performance for a wide range of LED's and power supply - high efficiency, usually 80-90% for boost converters and 90-95% for buck converters - can power LED's from both lower or higher voltage supplies (step-up or step-down) 9W LED Driver; . The AC/DC Emergency LED Bulbs are generally used in residential and commercial sectors as they give brilliant light and add energy to the climate of the spot.. Order) CN Yueqing Winston . LED candle lamps, LED capsule lamps and LED Light Raw Material is kept in our branch. Round. You will find the correct light bulb for your home. Candle lamps, LED Light PCB ; LED driver is recommended you high quality LED bulb ; Satellite. 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