250 Watt M58/H37 5-Tap Metal Halide Ballast KitMetal Halide Ballast Cross Reference: Advance Ballast 71A5750 001D Sylvania Ballast M250 MULTI KIT Universal Ballast M250ML5AC3M 500K Howard M0250 81C 211 K Sola E 871 WDD 251 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. Ballasts provide
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