ROBERTSON 3P20147 Fluorescent eBallast for 4 F54T5HO Linear Lamps, Program Start, 120-277Vac, 50-60Hz, Normal Ballast Factor, HPF, Model PSY454T5MVEL AH Equivalent to Philips-Advance ICN45490C2LSG, ICN4S54-90C, Osram QTP4x54T5HO/UNVPSN, QTP4X54T5HOUNV Equivalent to Universal B454PUNVE, B454UNVE, Keystone KTEB-454HO-UV-TP-PS, Fulham RHAUNV454LT5 Equivalent to General Electric GE454MVPS90, GE454MVPS90G, Hatch HL454HO/PS/UV/W, HL454HO/PS/UV/S Save and order the 2P20147 Quik-Pak of 10 units individually packaged Go to RobertsonDirect.com for complete technical data.