Hi Ulf,
thank you for sharing your thoughts.
I don't quite understand your post though. This looks to me like a wall-mounted aluminum profile for a strip light, not something mounted under the ceiling? Or do you mount the strips on the upper part of the wall, directed to the ceiling, so the light will be reflected from there?
This may work in a (narrow) corridor, but unfortunately not in my situation.
add-on: Have you seen their minimum order quantity, 100 meters ?
Also, as I see it, the problem does not (only) seem to be the direct light of the lamp hitting the eye, but the reflection of the light in the image. At least this is what the 'family of angles' is about, if I understand it right.
I have in the meantime found this, which would probably be my ideal solution:
https://www.seeger-licht.de/produkte.htmlScroll down about halfway the page, to "LED TRIXS Tracklight". (I can not find it on the english version of the web site. Generally, their web site seems badly maintained/outdated.)
This is a 2-string tracklight, the 2 strings can be tilted separately. Unlike for others of their products, there is no downloadable .pdf with technical details. And they have not responded to my e-mail inquiry concerning these - and a price. The latter will probably be the show stopper, I'm afraid...