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