ballast protective box, guarantee the normal and safe use of ballast. is used together with downlight fixtures(PLC lamp). ballast protective box(1*ballast type) power(for ballast): 1*9w, 1*11w, 1*13w, 1*16w, 1*18w, 1*20w, 1* 26wthis kind of box is used to carry ballast, guarantee the normal and safe use of ballast. It is used together with downlight fixtures that have PLC lamps.Please note we do ...