Yeah, the problem with this is that the meshes are instanced and the big boss said that you cannot use includedOnlyMeshes with instanced meshes, or that it only works with the main mesh? Creating lights dynamically that effect instanced meshes with includedOnlyMeshes - #2 by Deltakosh
Or so I at least understood 
So I can’t just instantiate the wall piece and try to tinker with what lights it accepts…