360 Degree Beam: Common festoon bulbs on the market usually can only achieve a single-sided 180 degree luminous effect, which means that they may be underilluminated at certain angles, especially in environments that require all-round lighting, this limitation is particularly obvious. However, our new 31mm mariner boat naviation light bulb completely changes this situation, it is able to achieve 360 degrees of all-round light, no matter from which Angle you can enjoy sufficient and uniform light. This means a more comfortable and safe lighting experience for outdoor activities Fast Heat Dissipation: In order to ensure the stability and brightness of the bulb, we pay special attention to the heat dissipation performance when designing. The interior of the 31mm festoon LED bulb is carefully installed with efficient cooling aluminum tubes, which can not only quickly export heat, but also effectively extend the service life of the bulb. The application of the cooling aluminum tube allows the bulb to maintain a 200lm high brightness even when used for a long time, and will not cause a decrease in light efficiency or damage due to overheating Universal Compatibility: With a 1:1 restoration of the original bulb size, our 31mm marine boat LED bulb are designed to be sealed with high-quality PC material is used outside the lamp, which to help festoon bulb fast dissipate heat, cools faster, lasts longer. waterproof, dustproof, anti-crash, flame retardant, not easy to break, more safe and reliable. It greatly improves the lifespan of the bulb with 30,000 hours save your time and money on replace the bulbs frequently Easy Installation: The bulb only supports DC 12v. Plug and play. Don't need to consider the + and - polarity of the bulb. Fitment-Replacement model number 3021, 3022, 3175, 6428, 6430, 7065, DE3175, DE3021, DE3022 Wide Application: The 6000K cool white 31mm LED bulb 1.5W DC12 volt is fit for navigation lights, anchor lights, bow lights, all round lights, stern lights, mast lights, masthead lights, running lights, front red/green lights, rear nav light, port lights, Perko Bow multicolor lights, side lights, steaming lights, bow lights holder, dome lights, car interior map lights, map lights, courtesy lights, license plate lights, glove box lights, cargo/trunk lights, etc. Common use for pontoon boat, sailboat, yacht, kayak, vessel barge ship, Boston Whaler bow, dinghy, bass boat, cabin cruiser, etc Notice: Please double check the scoket of the fixtures and the lengeth 31mm (1.22 inch) to confirm before placing an order Perfect led bulb for boat navigation lights, boat Stern Lights, decorate light, night light,deck lights, courtesy lights and boat Interior Lights on marine pontoon boat, dinghy, sailboat, kayak, bass boat, Jon boat, yacht, and so on.