ROBERTSON 3P20048 RSW220T12120 /B Fluorescent eBallast for 2 F20T12 Linear Lamps, Preheat Rapid Start, 120Vac, 50-60Hz, Normal Ballast Factor, NPF Equivalent to: Philips-Advance REL-2S40-RH-TP, RCN-2S40-SC, REL-2S40-SC, RK-2S34-TP, RK-2S40-TP Equivalent to: Osram QTP2X40T12/120RSN-B, QTP2X40T12120RSNSC, M28-120, M2-RN-T12-1LL-B-120 Equivalent to: Universal B240R120HP, B234SR120M-A, GE GE240RS120, Fulham WHCG127T12RSL Equivalent to: Keystone KTEB-240-1-TP, Espen VE240120HRP, Valmont M28-120-1 Save 32% and order the Quik-Pak of 10 individually packaged ROBERTSON units: 2P20048 RSW220T12120/B