That helmet must have a photo cell power supply for the autodarking to work. Mine has a small battery I have to change every other year or so. No flames on mine. LOL A guy I know had his lens special made for his bad eyes.. I do not know what it cost, but he has more money then god anyway.. LOL Anyway he will probably use very little anyway.. does most of his truck building in the catalog and check book... If you know what I mean.
