4" Iolite LED downlights require a dedicated Iolite new construction or remodel housing. Regressed cone construction optimizes visual cut-off and adjust up to 30°. Adjustability: 25° Compatible Housing: NHIOICD-415, NHIOICD-420,NHIOICDCP-415, NHIOICDCP-420 Lumens / Wattage: Up to 2000lm / 24W (varies by housing) Color Temperature: 2700K Color Rendering Index: 90 CRI Beam Spread: Three field changeable optics included Finish: Black Reflector / Matte Powder White Flange Listing: cULus listed for damp locations Accessories: NIO-AS, NIO-HC, NIO-FMMR-4R