American Lighting E4-E26-30-WH E Series White Recessed LED Ceiling Light Fixture, 4-Inch LED diameter is 4-Inch, Faceplate Diameter is 5-Inch, sits 3-3/4-Inch Deep Dimmable with most standard incandescent dimmers! Save in running costs over incandescent and eliminate frequent lamp replacements Easy to install - just remove existing lamp and trim, attach adapter to existing housing and secure LED down light with built-in clips SMD(surface mount diode) LEDs and integrated driver with aluminum heat sink