ROBERTSON 3P20139 Individual Fluorescent eBallast, 2 F39T5HO Linear Lamp, Program Start, 120-277Vac, 50-60Hz, Normal Ballast Factor, HPF, Model PSA239T5MVAH (Replaces Model PSA239T5MV/A) Equivalent to Philips-Advance ICN2S39, Osram QTP2X39-24T5HO/UNVPSN, Universal B239PUNVD Equivalent to Keystone KTEB-239HO-UV-PS-SL, Hatch HL239HO/PS/UV/S, HL239HO/PS/UV/W Equivalent to Fulham RHS230149LT5, RHS230249LT5 Save by ordering the Quik-Pak of 10 individually packaged ROBERTSON units 2P20139 Take advantage of Robertson's 60 years of electronic design and quality manufacturing experience.