I have the normal bulbs always blown and irritated in the long run. lamp I have built for comparison in addition to a normal 21 Watt tail lamp and the skin back quite well. the color and brightness match in about what is very important is because the LED probably are not approved in the highway code. that would not attract attention. when the bulb is bright but not too bright or so that the lights the rear light pink holding a probably always on. I can not say anything because I have no experience with it if the pay plan, or if that is allowed through the TÜV. I just do it.