LED downlights are a type of recessed lighting that consists of two components, the housing of the lights and the trims. The housing gets hidden within the ceiling and contains the electrical components of the unit. The trim is the visible, decorative portion of the light, which gives the room and the light its aesthetic. The advantages of LED downlights include simple installation, long life and energy efficiency. They are available in a variety of sizes and styles, lumen outputs and color temperatures.