For mechanics and service was already written enough, which is really perfect. A continuous brightness control would, however, still the icing ... This lamp can be described as "inexpensive" in the best sense, even if it is not exactly cheap. It is less pure brightness than to the large reflector of the lamp, which allows this incredible illumination of distant objects. A fitting comparison can be found in the main beam of the car. When I turn on this lamp in a car in addition to the main beam (Xenon!), It seems as if the car's headlights were off. This lamp illuminates the road far ahead of the vehicle considerably brighter than the main beam itself. Really impressive.