Do LED lights use a ballast?
No not a ballast like you would use in a fluorescent or high pressure lamp HID. LEDs are a low voltage device. Typically the semiconductor device that produces the light operates between 5 and 24 volts. The LED lights have a power supply that converts the high voltage to the lower voltage that is needed. Most LEDs light assembles will operate from 85 volt to 266 volts. This means that you can use them just about anywhere without major wiring changes. They are perfect for low voltage areas and are brown out resistant. Old style ballast used for fluorescent and high pressure lamps have to increase the voltage to allow those light bulbs to work.
