Lithonia Lighting® Downlight Housing, Airtight Contractor Select, Series: L3 Series, 120 VAC, 4 in Ceiling Opening, E26 Incandescent Lamp, 1 Lamp, IC/Non-IC Insulation, Ceiling Mounting, For Use With: P Series Open and Baffle Wide Flange LED Module/LED Gimbal Module/E Series Baffle Wide Flange LED Module, 4 in Diameter, 16-1/8 in Height, 11 in Width, Steel Housing Material