I use the pentair aqualuminator light as my return. The water is shooting correctly out of it, but some water is shooting up when I have the directional pointing 45 degrees. How do I stop the water frome escaping. This is inside the pool.

Sounds like the eyeball is cracked. Take it out and see if that's the case.

My aqualuminator does the same thing. Most flow though does go out correctly where it's aimed. I think there are a couple small holes drilled in the upper side, so I think that's normal. You could try tightening the nut that holds the bulb assy in, but the directional ring will be harder to move that way. I don't worry about mine, as I say, most of the flow does go where I aim it.