Metal Halide Ballast Cross Reference:
Keystone Metal Halide Ballast
Advance Ballast 71A5191
Universal M50MLTLC3M
GE GEM50MLTLC3D-5
Venture V90D5731K

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 system stability by limiting the current that can be drawn.

Core and Coil metal halide HID ballasts are used in over 90% of all HID lighting. Replacement ballast kits contain the appropriate core and coil, a properly rated capacitor and all components required for ballast replacement. The Keystone Technologies, core and coil, HID ballast kit is ideal for a wide variety of lighting applications, including factories, warehouses, gymnasiums and retail stores.

Keystone Ballast MH-50X-Q-KIT, 50 watt ballast transformer, Quad Tap (or Multi-Tap) 120/208/240/277V, replacement metal halide ballasts for 50 Watt Metal Halide, Core And Coil, Circuit Type HX-HPF, Metal Halide Lamp Type, 50 Lamp Watts, M110 ANSI Ballast Type, 67 Input Watts, 120/208/240/277 Input Voltage, 60 Hz. The dimensions on this MH ballast are 2.80" Long x 1.04" Wide x 3.94" High. This Keystone Ballast carries a 2 year warranty.