Hey Bzzzzz, if your making outside corners on 20 gauge, your not doing too bad. Are you coming downhill with it? Slows things down a little. Yes, the ambient light helps quite a bit. Everyone says "welders make there own light" but it doesn't quite work that way. Too much contrast. When I was younger, it didn't matter that much. I'm an old man now, and can't hardly see it without extra light (and glasses and magnifiers). I made four adjustable stands for 500w hologen that I move around with me, but I prefer to work in the door of my shop. You have got to be able to see the puddle. These are all manual welding processes (even wire feed). You have to control the heat and weld build up by watching the molten puddle, all the time. 20 gauge is tough, cause it does go fast. With GMAW, you can push the puddle (angle the gun in direction of travel) and get a better view of the joint. With self shielding fluxcore, take the nozzle off for a better view. Make sure your lenses are clean, that really makes a difference. Depending what your using, you might also try a shade lighter lens. Walleye's? I haven't caught a walleye in 20 years. All I get to fish for are those nasty steelhead, chinooks, rainbows, and cutthroats.