... t5 electronic ballast 54w 1.Power:14w,21w,28w,35w,54w 2.PF>98%,THD<10% 3.30000hrs, three ... years warranty 4.Complied with TUV t5 electronic ballast 54w electronic ballast Power: 14w,28w ... 2*35w,2*54welectronic ballast Features: 1.electronic ballast High Power Factor(PF>95%,THD<30%) ... temperature,low voltage start,no flicker 3.electronic ballast Protection for high voltage and high current ...