... , 21w, 28w, 35w, 54w, 2*8W,2*14w,2*21W, 2*28w,2*35w,2*54w---------------Features & Benefits Of T5 lighting Electronic Ballast :1. Metal shell, with insulation protection ... using, good looking.2. Stable performance, preheating start, input current and voltage protection ,extended the life of the fluorescent lamp.3. Super ...