... light is downy electronic ballast for fluorescent advertising light-boxSpecifications1) T4/T5/T8 electronic ballast 2) good ... :2*15w,2*18w, 2*20w,2*28w,2*32w,2*35w,1*36w, 2* ... anylighting convenienlty which should be matchwith T8/T4 lamp.Application:Hotels, chain restaurants,office buildings, museums, ... a lamp,two lamps,three lamps and four lamps.(We also have T8 to T5 adaptor and T5 fluorescent fixture ...