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. Required Trimless Mud Plate: NIO-TLMR-4RA Compatible Housing: NHIOICD-48. NHIOICDCP-48 Lumens / Wattage: 1000lm / 14W Color Temperature: 5000K 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