Downlighting Incandescent Recessed Housings: Housing Type - Recessed Downlight; Lamp Type - Incandescent; Nominal Aperture - 6" Round; Installation - New Construction; Ceiling Type - Non-Insulated; Air Rating - Non-Airtight; Depth - 5.50" (140mm); Ceiling Opening - 6.50" (165mm); Manufacturer Series - H27