4" Iolite LED downlights require a dedicated Iolite new construction housing. Die-cast adjustable cone reflectors optimize visual cut-off and adjustable to aim the light source in desired direction. Adjustability: 28° Compatible Housing: NHIOICD-415, NHIOICD-420, NHIOICD-425, NHIOICDCP-415, NHIOICDCP-420, NHIOICDCP-425 Lumens / Wattage: Up to 2500lm / 28W (varies by housing) Color Temperature: 2700K Color Rendering Index: 90 CRI Beam Spread: Three field changeable optics included Finish: Matte Powder White Reflector / Matte Powder White Flange Listing: cULus listed for damp locations Accessories: NIO-AS, NIO-HC, NIO-FMMR-4S