4" Trimless Iolite downlights have no exposed trim flange and do not extend beyond the ceiling plane. Iolite Trimless requires a Trimless Mud Ring and New Construction housing. Regressed cone reflector optimizes visual cut-off. and adjust up to 20° Required Trimless Mud Plate: NIO-TLMR-4RA Compatible Housing: NHIOICD-415, NHIOICD-420, NHIOICDCP-415, NHIOICDCP-420 Lumens / Wattage: Up to 2000lm / 24W (varies by housing) Color Temperature: Comfort Dim (3000K-2000K) 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-4RTFA