Completely sinnfrei however, is that the lighting fixtures are also secured by four Allen screws. This edit with the key provided is an impertinence. No idea what the designers have thought since ...
Another very annoying detail is that a commercial electrical cables can not be guided through the cable hole in the lamp, because the rubber sleeve is slightly too small. Applying too much violence, just press the sleeve in the lamp, and the moisture protection is gone. Because one really wonders if not previously ever tried someone, especially since other manufacturers manage it without problems. After all, in the foot enough space to stow the cable wires, and the attachment works fine.
The lamps were with us still flat, plate-like light bulbs. Today we would take LEDs, but we did not feel like another Schrauborgie, so we wait until the current lights have given up the ghost.
All in all a beautiful wall lamp with a great lighting effect by blasting up and down when you have the thing first attached, but in the assembly unnecessarily complicated and impractical in the maintenance thereby. Next time we would probably decide rather for a different model.