[Phlagm]

That's a problem with the alpha layer. It should be white where your ship is, but totally black under the lights area. If you don't have an alpha layer at all, you'll get black rectangles around all your ships (which may only be noticeable when they cross paths or when bullets impact the outside edge).

And if you have anything other than pure black under the lights section, it'll blot out your ship when they fade in.