Designed as an addition to any lighting fixture using three 8 watt fluorescent lamps on 115 vdc, box material aluminum 3003-h14, 6.312 in. O/a lg, 3.938 in. O/a w, 2.250 in. O/a h, four 0.281 in. Diameter mtg holes, three 330 ohm, 30 watt, resistors, one terminal block w/4 terminals, one 3/8 in. By connector