I came up with an idea that might help you improve with doing your light source. After you create a graphic create a layer on top of your other layers name it light source then choose where you want it to come from. Then with a white or light color (use a radial or linear gradient) with the layer named light source. That way you'll be able to see where it's at. That's what I do. And practice. I love your purple xbox sphere.
I have things that I gotta work on myself like giving my graphics depth and getting them so they are not pixellated.

Thanks for the tip Adventure, I'll have to try this out. And thanks for liking my "Purple" Xbox sphere.
I don't do much work using the Gimp Lighting Effect, mainly as I haven't had much success with it yet.

You will have success with it. I know you will. When I have the time I can do a simple tutorial.

I'm happy that you have confidence in me.
A tut on this would be great. Not just for myself, but for the entire GC community.