Vossloh-Schwabe M2212CK-7EUN Electronic MH Ballast, 22W M175 Metal Halide, 120V

120 Volts 50/60 Hz For one 22 Watt M175 MH Lamp Thermally Protected BallastYou may also like (case of 4) GE Lighting 68192 Magnetic Ballast, GEM220TS120/2-DIY, 2 lamp 120V ballast, 60 Hz, use with 20/15/15 watt lamps.