Quinctia replied and said that maybe what I cloned it from wasn't base game compatible or somewhere along the lines it became non-base game compatible. She said something about turning my EPs off in SimPe before cloning it, so maybe I will try that (I really just picked a light at random). Perhaps I picked a lamp that wasn't from the base game, or got updated with an EP you don't have?

Hopefully this will fix this :).