What do you do if you want to move a ceiling light a bit to the side? Do you install an entire new electrical box?
You don’t actually need the box though. In fact they weren’t even available in my previous two homes. It’s really more a convenience thing than anything.
But again, this is assuming we are talking about the same thing (region differences and all).
When I bought the Ikea light, it was just hook and no way to fix the plastic surround to the ceiling.
Ikea might have updated the light since then though. As I said before, I got the light when it was new, long before it went viral, and ikea might have tweaked the design since.