If you want the latest and greatest in full-blown through-hull underwater lighting, check out the newest offering from Sea Vision (Underwater Lights USA): light-emitting plasma (LEP) high-intensity through-hull lights. These solid-state lights generate high-frequency energy, "exciting" plasma to create about 120 lumens per watt of power. (Regular LEDs create about 72 lumens per watt.) Of course, the latest technology never comes cheap. You can expect the price to range from several thousands of dollars to tens of thousands of dollars depending on the size and number of the lights. Visit www.underwaterlightsusa.com to learn more.