You may already know this, you may already be way ahead of me on this, but I figured I'd point it out anyway. One thing you might want to look at: from the right menu below the view port, select Shadow Lite1 Cam (or 2 or 3, etc.) under the Cameras sub-menu. You will switch to the POV of light 1 (or 2 or 3, etc.) With this, you can see exactly where your light is aimed. If you want to adjust your light at this point, make sure you actually select the light prop itself rather than the Shadow Lite Cam.