7" All-Slope Ceiling Ic At, Slope Housing; Insulated Ceiling. Cooper Lighting Halo® Slope housing is designed for sloped ceiling installations from 2/12 - 12/12 pitch. It measures 14 Inch x 11.125 Inch x 7.625 Inch. It features socket-aiming mechanism that allows the lamp to be aimed straight down regardless of ceiling pitch. Air-tite housing prevents airflow between attic and living areas. Housing features integral thermal protector guards against improper lamping. Lamp socket and trim can be adjusted 15 deg laterally for compound slope ceiling or to compensate for off-axis aiming.