The actual lens in the TOPDC Solar Power Self Darkening Welding Helmet actually works fine, but the body of this helmet is made very, very cheaply. I use a cheat lens for TIG and the holder is so bad that the lens doesn't stay in place. It is almost impossible to straighten the helmet and hold the position. The headband falls out regularly. I do not recommend this product and will definitely not buy again due to the frustration of using it.