LUMAPRO(R), ELECTRONIC, FLUORESCENT BALLAST, BALLAST START TYPE PROGRAMMED, INPUT VOLTAGE 120 TO 277V AC, NUMBER OF BULBS SUPPORTED 2, MAX. BULB WATTS 55 W, BALLAST BULB TYPE T5, DIMMING NO, DIMMING TYPE NO DIMMING, DIMMING METHOD NO DIMMING, DIMMING RANGE NO DIMMING, CA TITLE 20 COMPLIANT YES, MIN. STARTING TEMP. 0 DEGREES F