ROBERTSON 3P20135, IEA432T8120N /B Fluorescent eBallast for 4 F32T8 Linear Lamps, Instant Start, 120Vac, 60Hz, Normal Ballast Factor, NPF (Replaces Robertson 3P20001, Model ISL432T8120 /B) Equivalent to: Philips-Advance REL-4P32-SC,REB4P32N,Osram-Sylvania QTP4x32T8/UNV ISN-SC Equivalent to Universal B432I120RH-A, B432I120RESA, General Electric GE-432-120-N Equivalent to: Keystone KTEB-432LBF-1-TP-PIC, KTEB-432RIS-1-TP-SL, KTEB-432RIS-1-TP Equivalent to: Howard E4/32IS/120SC, Sola E-758-F-432-SC Save and order the 2P20135 carton of 10 units individually packaged; Save the most with the 5P20135