This Halo 9 in. Square Steel Recessed Lighting Housing accepts up to a 100-Watt incandescent bulb to provide bright downlighting in your room. Install this housing in new construction where there is either no insulation or where insulation is kept at least 3 in. from the housing. With an integrated thermal protector and pre-installed captive bar hangers, this housing safely and easily installs within 24 in. x 2 in. x 6 in. joist spaces or onto drop ceiling T-bars.