Line Voltage MR16 GU10 housing provides the crisp reflectance of MR16 light sources in insulated ceiling environments. GU10 lamps are shielded and feature solid, heavy duty turn-and-lock contacts. Bailey Street Homes GU10 fixture is quick to install, operates on standard incandescent dimming controls, and accepts a wide variety of high quality, adjustable finished trims. IC Recessed housings are high quality, light weight units ideal for use in insulated ceilings. Air-tight construction reduces energy costs by reducing the amount of air escaping through the ceiling. Rated for direct contact with insulation (except spay foam insulation) and combustive materials.