Robertson Worldwide ISA232T8HEMV /A 3P20123 120-277 Vac 50-60 Hz Normal Ballast Factor HPF Fluorescent Ballast for 1/2 F32T8 Linear Lamps Successor to ROBERTSON 3P20004, Model ISU232T8HEMV /A Equivalent to: Philips Advance IOP-2P32-SC, Osram-Sylvania QHE2X32T8/UNVISN-SC, QTP2X32T8UNVISNSC Equivalent to: Universal B232IUNVHE-A, General Electric GE232MAX-N/ULTRA, GE232-MV-N 120/277 Equivalent to: Howard EP2/32IS/MV/SC/HE, Hatch HL232BIS/UV/HE/W Anti-Striation, Inherent Surge Protection, Sound Rated A, Parallel Lamp Conncetion