The Aluminum Insulated Ceiling housing is universal. Designed more for installations where the housing will be in direct contact with ceiling insulation. The Integral Thermal Protector provides positive protection against over lamping or improper lamping. Adjustable socket bracket allows the use of different lamp types and sizes as well as proper and consistent lamp positioning. Junction box is listed for through branch circuit wiring and has 1-2 inch knockouts with true pry-out slots. 7 1-2 inch height allows for use in 2 x 8 inch construction.