As can be seen in the image of the manufacturer with the dimensions the LED bulbs are rather large in size. One must therefore consider whether they fit into the socket. For me it worked. An LED bulb fills in length and in height the reflector in the version entirely made. The cover glass still fits exactly on the LED bulb. The material of the LED bulbs is an elastic plastic. Thus, the cover glass of the reflector pushes the elastic plastic together something and so closes the luminous body.
By 3W LED bulb which a temperature of the entire filament is much smaller than when using a 20W halogen Birnchens. It amounts to about 50 ° C after a longer operating time. With a 20W halogen bulb the filament is so hot that you can not touch him. The power of pictures and leaves me a good conscience if I have turned on the light bar.
If you size this 3W LED bulb, it is this allows a very good replacement for a 20W halogen bulb.