ROBERTSON 3P20005 PSA228T5MV /A Fluorescent eBallast for 2 F28T5 Lamps 120-277Vac, 50-60Hz, NPF, HPF Equivalent to Philips-Advance ICN-2S28, Osram QTP2x28T5/UNV, Universal B228PUNV Equivalent to Keystone KTEB-228HE-UV-PS-SL, General Electric GE228MVPS, Hatch HL228HE/PS/UV/W Equivalent to Fulham RHA-UNV-228-LT10