Quote Originally Posted by Jasonz172 View Post
I think it's the mask (because without the mask, the arc doesn't seem to get drastically brighter or dimmer when watching the reflection on the wall)
Watch out for that. The reflection can get you. The worst flash burn I ever got was from helping do some aluminum fitting for another welder. I was just holding pieces so I would just look away or close my eyes, when he tacked things up. Not a good plan, several hours later I got hit with some of the worst pain I have ever felt and had to go to the hospital to get anesthetic for my eyes. Learned my lesson that night for sure.

Even if your helmet doesn't stay dark, it will still filter you from UV and IR so you might get dazzled, but not burned. Try going through the settings for your helmet to make sure you are not missing something, and turn the delay up so that even if you block the sensor for a second, it will stay dark long enough to recover. For most things sensitivity up full and delay up full will be your best bet for low amp TIG.