I bought a motion activated light. When I went to install it, I found my old box was rectangular. I thought about moving the two lights and sensor from the new cover to the old cover, but they might be crowded in. So I bought a round box, only to get it home and find it was 4", while the new cover is 4.5".

I can't find a 4.5" box. Do they exist? If not, I guess I will be sending the light back. Oh well.