ROBERTSON 3P20015 ISA332T8HEMV /A; NEMA Premium eBallast for 3 F32T8 Lamps, Instant Start, 120-277Vac, Normal Ballast Factor, HPF (Item sold now as single quantities as ROBERTSON 3P20167, Item now available in a 10 ea. Quik-Pak as ROBERTSON 2P20167) High efficiency electronic ballast, Instant Start,Parallel Operation,High Power Factor,Sound Rated A Internal surge protection,Inherent Thermal Protection,RoHS Compliant,No PCBs Save 18% and order the Quik-Pak of 10 individually packaged ROBERTSON units: 2P20015 ISA332T8HEMV /A Five Year Factory Warranty-ONLY if the Amazon Seller is ROBERTSON WORLDWIDE. Take advantage of ROBERTSON's 60 years of electronic design and quality manufacturing experience