Robertson Worldwide ISL432T8HEMV AH 3P20160 120-277 Vac 50-60 Hz Normal Ballast Factor HPF Fluorescent eBallast for 4 F32T8 Linear Lamps Successor to Robertson 3P20002, Model ISS432T8HEMV /A Equivalent to Philips-Advance IOPS4P32LWSC, ICN4P32N Equivalent to: Universal B432IUNVELA, Hatch HL432BIS/UV/HE/W Equivalent to: Osram QHE4X32T8UNVISLSC, QTP4X32T8/UNV-ISN-SC-B, QTP2X32T8UNVISNSC Equivalent to: Fulham WHSG2UNVT8IS