These SYLVANIA Contractor Series LED RT5/6 Gimbal (Recessed Downlight Kits) are constructed of plastic bulbs and the trim measures 7-3/8 inches in diameter. Replacing older mercury and lead incandescent lamps with these low-wattage LED lamps will help reduce energy consumption up to 84%. With up to 50,000 hours of life expectancy (L70), these lamps can last over 25 times longer than the older incandescent lamps. These environmentally preferred products operate without any harmful UV emissions or IR radiation, and require no warm-up time. These lamps are made with an instant-on design feature, with full light output and stable lamp to lamp color. These versatile SYLVANIA LED lamps are CEC compliant and they meet California title 24 fixture requirements for high efficacy luminaire.