This HID Electromagnetic Ballast offers long-lasting reliable solution for HPL, HPI (Plus) and SON-H lamps. It offers long-lasting reliable solution protected from overheating; better for hot environments than its predecessors. Metal-halide lamps (HPI) to be used with SI51 ignitor. It features capacitor value to match system power can be found on lamp/ballast combination sheet. The Ballast is designed for mercury lamps (HPL) without using an ignitor can also be used with HPI lamps with an ignitor. It also features minimal watt losses thanks to ortho-cyclic winding process, control gear can be installed remotely.