Diode LED DI-DV-12V60W-277 60 Watt Constant Voltage Driver 12V DC 100-277VAC.Constant Voltage Drivers provide steady voltage and high efficiency for LED lights. These dimmable drivers can be used with low voltage PWM dimmers such as the REIGN Wall Mount Dimmer Switches and our line of inline LED dimmers. All of these constant voltage drivers are solid state, so they have a longer life than a switching power adapter, and draw power only when the attached LED light fixtures are on.