AGPTEK Anti-corrosion IP68 Waterproof 1/2" NPT DC8-28V 27W Underwater Boat Drain Plug Light for Fishing Swimming Diving - Blue/White WATERPROOF & SHOCKPROOF: The shell is made of aluminum which has great anticorrosive effect. The shell surface is titanium alloy plated that not only increases the gloss but also further enhances corrosion resistance and wear resistance. We know that titanium alloy is expensive and wildly used in important machine as airplane engine for good anti-corrosion and radiating effect.It will not effect by engine movement, so you can use it when cruising. GREAT LIGHTING & CONVENIENCE: 9 high power 3W CREE LED lamps contribute to total 27W lighting. 180viewing angle, luminous flux 1800Lm.Standard "NPT screw is easy to set up. The waterproof joint is good to remove. GOOD HEAT RADIATION: Aluminum housing and titanium alloy plated form a good cooling system to protect the light and extend the serve time. 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. HIGH QUALITY: The lights go through shell molding, polishing, electroplating and other procedures. In each procedure, we pick up the best one into the next round of processing. Only 3 lights can finally deliver to our customers in per 5 lights. So, trust our quality!!!