Do auto darkening welding helmets work? Are they worth ...

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Hello welder6g, I would certainly agree with your analogy concerning certain characteristics regarding using auto-darkening hoods. You said that the folks at your company experienced headaches and other things from the use of these hoods, I could see that if the hoods didn't have sensitivity and delay functions incorporated into them. As with any tool there are limitations and specific uses for this type of item and I would venture to say that if they are used properly there is little chance of damage to one's eyes. I have used a considerable number of the different types available, ranging in price from around $50 to probably $400, there are differences in how they feel, how well I have perceived them to work, how clear the images show up through them, the color of the actual shade that you are welding with, the amount of distortion that is present while you are welding with them, whether they flicker on and off while trying to use them at low amperage levels, and any number of other things that you could comment on.
     I was once told that the basic principle for their operation was a patented process and a particular company held that for a period of time and thus the cost of them was somewhat high. The only way for other companies to build them was to pay for the right to use the technology, thus the cost remained high. I believe that time has passed possibly and that is why you are now seeing a lower cost product in some cases but, not necessarily the same quality or good quality.
     I have also been told that a great majority of these lenses will protect you from UV rays whether they are turned on or not. I do not know that for certain. I certainly won't argue that a quality tempered glass welding lense will have superior optical quality, however, as I believe you also somewhat stated there are places for the autoshades. My $.02, regards, aevald

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