The recessed lights in the set of three are made of nickel-matte steel with a clear glass cover and impress with their simple, modern design The light bulbs with GU10 base (each 4 watts, 400 lumens, 2700 kelvin) are included in the delivery; with their warm white light, the LED spots provide a pleasant and even basic illumination This product is an enclosing product with a light source of energy efficiency class E; enclosing products are luminaires that can be disassembled for separate inspection of the contained light source(s)