IC Recessed Lighting Housings
When a recessed light fixture is turned on the light source within the housing generates heat. This makes the exterior of the housing itself that is inside the ceiling cavity hot. If any insulation were to touch the recessed can there is a considerable risk of fire. So, if this describes your situation you will need an IC-rated recessed can light. These types of housings include an outer wall to protect against any combustion when insulation comes in to contact with the housing.