Keystone Technologies, KTEB-242-UV-RS-DW-KIT, Dual Wire Case Ballast, 42 W Lamp, 120 to 270 V AC, 50 to 60 Hz Frequency, Rapid Start, -18 deg C Minimum Starting, 2 Lamps, Thermal Protection: Class P, 90 deg C, Steel, 5 in L x 3 in W x 1.38 in H Dimensions