A co-worker of mine has an auto-darkening helmet he got from Northern Tool that S.T.B ($hit the bed). He's asking me if he should get a battery or solar-powered helmet. I honestly don't know much about 'em, so I'm asking here. I got a Lincoln auto-darkening helmet from Home Depot, used it a few times and it seems pretty good. So basically, do you have to buy a high-end helmet to protect your eyes?