100 Watt S54 High Pressure Sodium Quad Tap Ballast KitHPS Ballast Cross Reference: Advance Ballast 71A8071 001D Sylvania Ballast LU100 MULTI KIT GE GS100MLTLC3D 5 MagneTek S100MLTLC3M 500K Howard S010071C511K Venture V90D1333K Grainger 1A031 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.