4" Mini IC rated and NON-IC rated cans and trims are used where low plenum or 6" joists are present.All housings are thermally protected and come with a pre wired j-box. Airtight and NON airtight units are available. UL Listed for feed through wiring and damp location.Accomodates up to 50W/R20 or PAR 20 Lamp with proper trim.