This Light is A Thomas 6" White Drop Opal Resse Light Trim made Pacificly for Wet locations. Best for Showers, Outside porches, Ect. any place there is going to be water around. It will fit almost all back boxes. Juno,Lightolier,progress Ect. It take a standard A 19 Light bulb of 40watt max. Retails for $36.58.