When I first saw these lenses, I had two thoughts: First, I knew that a dream had come true. Second, that my dreams are kind of strange. But here's the deal. I fish a few weeknight bass tournament series during the summer months. They typically end about 9 p.m., which means the final hour of each event is done as the sun rapidly fades. Normal polarized lenses are simply too dark to use during that "magic" hour. And I curse the setting sun every time. Costa's Sunrise Silver Mirror lenses, are designed specifically for low light conditions. The lenses have a slightly yellow tint that greatly enhances visibility on cloudy days and, of course, during sunrise and sunset periods. Like all Costa lenses, clarity is excellent and the polarization is top-notch. The lenses are available in a variety of frames, starting at about $120.