175 Watt M57/H39 Quad Tap Metal Halide Ballast KitMetal Halide Ballast Cross Reference: Advance Ballast 71A5570 001D Universal Ballast M175MLTAC3M 500K Sylvania Ballast M175 MULTI KIT Venture V90D6111K Howard M0175 71C 212 K Sola E 871 W 117 High Intensity Discharge (HID) lamps require a ballast to apply starting voltage to the lamp and establish current flow an arc between the lamp electrodes. Without a ballast, the arc will extinguish or draw increasing current until some circuit element burns up.