Keystone Technologies, KTSB-E-1040-14-UV /A, Electronic Sign Ballast, Parallel Wiring, T8HO/T12HO Lamp, 325 to 352 W Wattage, 120 to 277 V, 1.25 to 3 A, 50, 60 Hz Frequency, Instant Start, -30 deg C Minimum Starting, Power Factor: >0.90, 1 to 4 Lamps, -30 to 90 deg C, Metal, 2.20 in H x 3.23 in W x 14.45 in L Dimensions