4" Iolite LED downlights require a dedicated Iolite new construction housing. Die-cast adjustable reflectors optimize visual cut-off and adjustable to aim the light source in desired direction. Adjustability: 38° Compatible Housing: NHIOICD-415, NHIOICD-420, NHIOICDCP-415, NHIOICDCP-420 Lumens / Wattage: Up to 2000lm / 24W (varies by housing) Color Temperature: 5000K Color Rendering Index: 90 CRI Beam Spread: Three field changeable optics included Finish: Haze Reflector / Natural Metal Flange Listing: cULus listed for damp locations Accessories: NIO-AS, NIO-HC, NIO-FMMR-4S