@moira @theantlady @ascentale @bikenite: I guess I just haven't found the right words. Let me try with a picture. See those two (vertical) Knog Plus taillights on the trailer. They're sitting in lugs in the reflective fabric stripe going all around the trailer. Those lugs are only at these two points (and one more for the security flag's post) especially to mount taillights. I wonder if there's a Lumos Firefly mount which fits into these lugs, too.