Enhanced Lenses Miller offers its new line of Auto-Darkeing Welding Helments with new replaceable battery/solar assist Performance Series™ lens technology. The new Series lenses will be available in early 2004 for the Xli Series, Xlix Series and Big Window Elite™ Series and the Big Elite helmet making its debut in 2005. The new replaceable battery/solar assist feature of the lenses gives the helmet extended life and the lenses for the Xli and Xlix Series is powered for 2,000 hours and have the ability to sense low light levels associated with low amperage TIG applications and out-of-position welding.