1.Strengthen body, nice looking 2.The design is easy for install, low maintenance cost 3.Long life-span, less noise, high quality ballast 4.High quality powder coating, prevent scratch DZJ-H02118M T8 18W DZJ-H02130M T8 30W DZJ-H02136M T8 36W DZJ-H02218M T8 18Wx2 DZJ-H02230M T8 30Wx2 DZJ-H02236M T8 36Wx2