Are auto-darkening welding helmets safe?
Added (1). I want to know if auto-darkening helmets or fixed shade lens are safer. I don't care about speed or productivity. I am looking for some hard data showing one is safer then the other. Also, are lens shades comparable? Can't find any info other then personal opinions, most of which are about increased productivity. All I care about is what is safer for my eyes. Please only share hard data on the matter. Thank you.
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Are auto-darkening welding helmets safe?