4" PLUS Trimless Iolite downlights have no exposed flange and do not extend beyond the ceiling plane. Iolite PLUS Trimless requires a PLUS Trimless Mud Ring and New Construction housing. Deep regressed cone reflector optimizes visual cut-off. Required Trimless Mud Plate: NIO-TLMR-4PR 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: Bronze Listing: cULus listed for wet locations Accessories: NIO-AS, NIO-HC, NIO-4PRTFA