... factor: 0.557,base:E27,B22,E148,plastic: PBT, PC9,tube diameter: 9mmadvantage:1.more than 10years OEM experience2.Certificate: CE3 ... rendering is excellent ,nice light distribution.application:Factories, storages, supermarkets, stations, garages and stadiumsabout our factory:our factory in specified in energy saving ... Provide Quality Services.3 To Build Solid Relationships. 13w 9mm tube light