ROBERTSON 3P20043 RSU228T5120 /A Fluorescent eBallast for 2 F32T8 Linear Lamps, Preheat Rapid Start, 120Vac, 50-60Hz, Normal Ballast Factor, NPF Equivalent to: Philips Advance ICN2S28, Osram-Sylvania QT2X28120PS, QT2X28277PS, QTP2X28T5120PSNE Equivalent to: Osram-Sylvania QTP2X28T5277PSNE, Universal B228PUNV-C , General Electric GE228MVPSA Equivalent to: Hatch HL228HE/PS/UV/S, Fulham WH4120L, Keystone KTEB-228-1-TP-PH-SL Save 32% and order the Quik-Pak of 10 individually packaged ROBERTSON units: 2P20043 RSU228T5120 /A Two Year Factory Warranty-ONLY if the Amazon Seller is ROBERTSON WORLDWIDE.