Despite the ordinary looks of the Solar-Powered Welding Helmet, this item actually does way more than one would think.
What's interesting about the Solar Powered Welding Helmet is that it's probably the only one of its kind. This headgear has the ability to automatically darken itself (depending on the situation) when you're in the middle of fabrication. Of course, it lights up once the sparks stops flying. The response time is immediate (it reacts within 1/25,000 seconds) thanks to the small solar cell that's been built in above the viewing window. According to Ubergizmo, "all solar energy collected will power the rechargeable lithium battery."
There are three different designs available and they do meet industry standards, so pick one up if your work involves a ton of fabrication.