Finally starting to dial the lighting in (thank you @ceciliabr and other). I'm pretty sure the ceiling lights I'm using came from @ceciliabr and they helped me solve the mess I had originally.

But after adding them, I get this light line along the ceiling - and around the ring of the lights as well. I can't figure out where it's coming from I've tried modifying the lights but I guess I'm missing something in there.

Ideas?