Complete set of (4) PS1 housing fixtures and (4) Model No. TRM30W white baffle. For new construction, pre-wired, UL (Underwriter's Laboratories) listed for damp locations. Thermally protected housing. IC (insulation contact) rated for use in direct contact with thermal insulation and with trims accepting up to 75W (watts). NON-IC applications (when not in contact with thermal insulation) can use trims accepting up to 150W. Features adjustable socket plate that can be removed for use with fully enclosed trim. Ceiling opening 6-1/4 inches. Requires (1) incandescent medium base light bulb, not included.