Why target UV light?
About 60% of sunlight that cuts through the water’s surface is UV light. UV light penetrates clear water far deeper than human-visible light. Oceanographers have found UV light 700’ deep. The scales of many prey fish reflect UV light. Bluegills are an example. Zooplankton, shrimp, squid, and many aquatic insects also reflect UV light. This silhouettes them against their blue-green background, making these creatures more visible to their predators. UV light also polarizes, especially early and late in the day. Diverse gamefish detect polarized light.
