The 5" IC airtight remodel can be used in insulated ceilings with lamps up to 75W and has a 7.5" height that allows for use in 2" x 8" construction. This item has a pitch range from 2/12 to 6/12 ceiling slopes, and also has a junction box listed for through branch circuit wiring with five 1/4" knockouts and 4 true pryout slots for romex cable.