[midoridensha]

>Yes but we are talking about bulbs (with Edison base) here not all-in-one fixtures.

Sure, but there's little difference between the two practically. Both of them are a light-emitting device, which plugs into a simple, standard socket on the ceiling. The ones I refer to are bigger, since they're meant to light up a whole room, but otherwise not really different, except that the standard socket is a lot better and easier to use (you just turn the fixture a quarter-turn to plug it in).