... .The light is downy electronic ballast for fluorescent advertising light-boxSpecifications1) T4/T5/T8 electronic ballast 2) good quality without noise ... installed in anylighting convenienlty which should be matchwith T8/T4 lamp.Application:Hotels, chain restaurants,office buildings, museums, stadiums, ... specializing in T8/T5/PLL electronic ballast from 8w-58w,with a lamp,two lamps,three lamps and four ...