Product_description: ['4″ Pearl LED Retrofit series is cULus classified for use in existing IC or Non-IC housings manufactured by Nora and others. The 4″ retrofit luminaires deliver over 1000 lumens (800 lumens with Comfort Dim option) with die-cast adjustable cone for optimal visual cut-off and adjustability to aim the light source in desired direction. Compatible NORA Housings: NFBIC-4LMRATA = Fire Rated LED Housing NFBIC-427LMRATA = Shallow Fire Rated LED Housing NFBIC-4INCATA = Fire Rated Line Voltage Housing NSIC-4LMRAT = Max. Adjustability LED Dedicated ICAT Housing NHIC-4LMRAT = IC Air-Tight LED Housing NHIC-427LMRAT = Shallow IC Air-Tight LED Housing NSIC-401QAT = IC Air-Tight Line Voltage Housing NS-401QAT = Non-IC Air-Tight Line Voltage Housing NHIC-4G24AT = IC Air-Tight GU24 Housing NHRIC-4LMRAT = IC Air-Tight LED Remodel Housing NHRIC-427LMRAT = Shallow IC Air-Tight LED Remodel Housing NSRIC-404QAT = IC Air-Tight Line Voltage Housing NSR-404QAT = Non-IC Air-Tight Line Voltage Housing NHRIC-4G24AT = IC Air-Tight GU24 Housing'] (Page 1)