4" Iolite LED downlights require a dedicated Iolite new construction housing. Bullnose with a filleted aperture which allows for minimal aperture brightness while still producing the nadir footcandles. 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: 3000K Color Rendering Index: 90 CRI Beam Spread: Three field changeable optics included Finish: Matte Powder White Listing: cULus listed for wet locations Accessories: NIO-AS, NIO-HC, NIO-FMMR-4S