AGPtek 6 LED 1/2" NPT 12V 9W Underwater Boat Drain Plug Light with Waterproof Connector for Fishing Swimming Diving - Blue REAL WATERPROOF: The shell is made of bronze which has great anticorrosive effect and far better than brass. The shell surface is chrome plated that not only can bright the glossiness but also further enhance corrosion resistance and wear resistance. It's easy to generate a layer of passive film to prevent further corrosion when chrome reacts with seawater. ENERGY SAVING & GOOD LIGHT EFFECT: High power CREE LED lamps have good luminous flux and efficiency. 120Viewing angle. VIBRATION PROOF: It will not effect by engine movement, so you can use it when cruising. WIDE USAGE RANGE: You can use the lights in many ways, such as night fishing, night fishing, lighting up your wave when underway and creating good effect in your boat. LONG LIFETIME: It adapts newly upgraded thermal conductive packaging technology which makes great heat dissipation effect and extends service life of more than 1 year.