The Amphibian Drain Plug Light uses a 316 Stainless Steel Sea-Dog® Line drain plug and your existing drain hole to make this super bright light the world’s easiest to install - and safest with reverse polarity protection. The efficient underwater lighting solution for boats up to 25’ (7.5m). With a life span of more than 40,000 hours and Active Thermal Control, a built-in temperature monitoring system, the Amphibian Drain Plug can be used while under way, at anchor attracting fish, idle at the pier, or as a flood light above the water. Installation is simple utilizing the existing drainplug hole; the T3s Drain Plug can retro-fit as a complete system in one. The T3s Drain Plug also has a unique 2-step design which allows drainage without removing the light or putting tension on the power cable.