Headlamp components, such as low beams or fog lamps, distribute light according to a pattern with a light/dark boundary. Below this boundary the widest possible field of vision is realized for the driver, while at the same time, the drievers approaching in the opposite direction are protected from excessive light. This area of reduced illumination is ensured using shield positioned around the bulb, or through the precise guidance of the light ray with the help of the reflector and, if necessary, other optical components. Depending on the particular headlamp design, either reflection systems (lamp and reflector) or projection systems (lamp and reflector and projection lens) are used for low and high beam functions.