The grooved edges in the lower portion of the baffle trim combat glare at the ceiling line. They eliminate glare by absorbing stray high-angle light. This Lithonia 6" basic baffle has a plastic flange and a white trim. It has been damp location listed. Plastic trim. White baffle. 6" height. 5 7/8 lamp opening 7 5/8 diameter Takes one 120 volt 13DTT or 26 TRT lamp (not included).