That is why I would also be almost inclined to forgive even 5 stars.
But an absolute no-go is the wrong indication of the lamps length. This is specified with 53 mm both in the description and also about the image. In fact, however, there are 54.7 mm, if you count the domed "glass protection", even almost 58 mm. The term "glass" what I think is misleading.
Also striking that the Ledman developed a much greater heat compared to Müller-light. Therefore, it was positive that the heat ring that was required in the ceiling lights in conjunction with the halogen lights, still fits.