... . 2,Stylish and modernization. 3,Dust proof. 4,Diffuser is held by means of white plastic 1,Protection Rating ... Entry:Two diameter 19mm holes on top of the luminaire.6,Lamps:18w,20w,36w,40w linear fluorescent tubes ... polystyrene plastic extruded elliptical wraparound diffuser. primatic pattern on top surface and outside fluttered pattern on each linear side. Half curved diffuser luminaire batten