Air-tite construction helps prevent air flow from the attic to the living space 3 in. aperture provides illumination for your general lighting needs Use for new construction where insulation will be kept 3 in. away from all sides of the housing Compatible with 120-Volt GU10 lamp (sold separately) Pass-N-thru bar hangers for easy installation Slide-N-side junction box allows wiring connections to be made outside the box