Philips Advance Mark 10 Powerline dimming ballasts make converting your existing fixtures as easy as 1-2-3. Simply replace the ballast, replace the switch, and dim the lights. That's all it takes! The Advance VEZ-3S32-SC-35I dimming fluorescent ballast operates (3) F32T8 lamps at 277 input volts. Ideal for use in normal light areas, this ballast is typically used in offices, board rooms, and retail.