Compact and efficient recessed housing fixture. Ideal for residential or light commercial applications. For installation in insulated ceilings and non-insulated ceilings with air-tight code compliant construction. Compatible with a variety of trims and finishes to create different lighting effects or to match any decor. May be retrofit with compatible Halo LED (light emitting diode) lighting systems. Features bar locking screw with universal head, patented locking screw below the ceiling, adjustable socket bracket, hinged j-box door for easy access, and unique inverted Q interlocking channel for rigidity and stability.