ROBERTSON 2P20084 Quik-Pak of 6 Fluorescent eBallast for 3 F32T8 Linear Lamp, Instant Start, 277Vac, 50-60Hz, Normal Ballast Factor, HPF, Model REI332T8277 /B Also offered as a individually packaged version by ordering our ROBERTSON 3P20084 Offering the broadest ballast/LED Driver line available on Amazon. Take advantage of Robertson's 60 years of electronic design and quality manufacturing experience. Commerical grade. Two year warranty. Go to RobertsonDirect.com for complete technical data.