LED Street Lights are integrated LED luminaires designed to illuminate roads, streets and highways and replace HID street lights. HID street light fixtures have traditionally been used to illuminate roads and highways. They come in various sizes and wattages depending on the class of road to be illuminated and the height and spacing of the poles. HID street lights consist of a street light housing with reflector and lamp holder. An HID lamp fits into the holder and it is supplied power through a ballast (control gear). HID street lights are inefficient as a lot of the energy supplied is wasted as invisible heat and a lot of light is lost in the fittings design and reflector.