They would need to be up very close to the wall, even parallel otherwise you would get overlapping colour rings etc.I was meaning, like a black PVC 50 to 100mm long against a wall or ?
You might get a beam against the wall or ?
(Bars effect) Might have to be a matt or it may get a bit more spread from the refractions.
I ordered these through Etop Lighting on Aliexpress, there is no product link as they aren't something they carry normally from what I was told.Which vendor supplied these?
Thanks for posting the pictures and videos.