Elliptical projector light produces a razor sharp horizontal cutoff beam pattern. This pattern eliminates reflected light coming back into the driver?s eyes and stops stray light from offending oncoming traffic. Switching between driving lamp and projector lamp allows the driver to modify lighting instantly. Prism cut lens provides strength as well as optimum clarity. Die-cast aluminum construction with black powder coated finish provides a lifetime of rust free protection in the most severe conditions. Super strong rust-free die-cast zinc mounting brackets reduce lamp vibration.