But: The lens on the LEDs produces a distinct yellow curved edge on the wall, which is brighter than the light - just unusable, it lacks a reasonable diffuser.
Remedy - and then the strips are the best thing I've ever seen: Just stick a strip of window film (sandblasting appearance without pattern) and the light is perfectly homogeneous, without light spots or yellow stripes.
The film can be found on Amazon with me glass film, window film or so, usually there are 60 cm wide and from 1 m length, the modification for up to 15 lamps will cost less than 5 euros.
Ralph