To answer your question - yes, you can add a globe to your pump. Just figure out whether it's a wide
or a narrow
pump and buy the correct globe holder.
Once you have the holder in-hand, center it on the upper 'skins' of the pump and mark where to drill the hole. Use a hole-saw and go for it. Work slowly so you don't bend the sheet metal when you push on it.
You only really need a hole big enough for the socket to pass thru dispite what the 'factory' did originally. It's much easier to drill a smaller hole than it is to drill a 5-incher due the the curvature of the top of the pump.
You will have to modify the light manifold to add the necessary piping and socket for the bulb - but most manifolds are already set up for that, so it's usually not a big deal. You should rewire the pump anyway so just do it all at the same time.
Later . . .