do search of vintage spotlights or try finding pictorial references to early version of them and you'll find it's a bit difficult to do so. I'd bet the artist team gave up after not finding a good reference that is easy to draw/outline from.
though I guess they could have done the floor candle models but perhaps they didn't want the scene to be too cluttered?
@summerofblue remember that this is NOT our world. This is a world in another dimension? or in a very far away distance. They have a similar culture to earth but is not earth. If this was earth, you would in point, but we don't know how things evolved.