... RoHS & EupAdvantage: (1) Preheating Start, Enlarge the lifetime of fluorescent lamp(2) Wide application Range, 198~264VAc/-15~50°C work ... °CCase Temperature (Tc), 70°CPower Factor, 0.98Crest Factor of Lamp Current (Alcf), <1.70U-OUT, <250VAcPreheating Time, 0.4-2 ... /FE7136, 267~270mmFE7218/ FE7230/FE7236, 304~307mmFE7158/ FE7258, 343~346mm Electronic Ballast_T8 Professional Series