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. Deep regressed cone reflector optimizes visual cut-off. Required Trimless Mud Plate: NIO-TLMR-4SA Compatible Housing: NHIOICD-48. NHIOICDCP-48 Lumens / Wattage: 850lm / 12W Color Temperature: 3000K Color Rendering Index: 90 CRI Beam Spread: 10° Spot (fixed) Finish: Matte Powder White Listing: cULus listed for wet locations Accessories: NIO-AS, NIO-HC, NIO-TLSUCTION