GE-05005 | GE-05042/GE-05042 Waterproof & Dust-proof: shower or bathroom light fixture, IP65 waterproof and dustproof, ideal solution for wetlocations, lighting up your bathroom and shower room, and other damp areasavailable. Beam angle: 45° (condenser), cutout: 3 inches, anti-glare neutralwhite light 4000K, spay white. AIR TIGHT: the unit is sealed, air can't goabove ceiling and won't create thermal issue or energy loss. DIMMABLE: dimmingrange is 5%-100%, no warm-up time needed, instant on, no flickering and humming. Down light can be dimmable when one or more light fixtures were connected to an led dimmer switch. EASY INSTALLATION: fast, easy, and safe installation; It was mounted in a cutout 3-inch hole with spring retaining clips.JUNCTION BOX is necessary for US electrical code, excellent product for US market, no recessed housing required.