New upgrade: Brand new design, compared with the models on the market, our 31mm marine LED festoon bulb has a built-in heat dissipation aluminum tube, which greatly improves the heat dissipation efficiency of the bulb, allowing the bulb to maintain high brightness for a longer time. Brightness upgrade, only 1.5w can have 200 lumens of light output, 360-degree light, no dark spots, surpassing the limitation of the old single-sided 180-degree light on the market, no matter from which angle, you can enjoy uniform and bright light Classic reproduction, safety upgrade: Our 31mm nav light bulb are designed to restore the size and shape of halogen lamps 1:1, which not only retains the beauty and practicality of the original lampshade, but also enhances the waterproof and dustproof performance. The unique PC lampshade design provides a safer and more reliable lighting experience compared to the common bare board bulbs on the market Easy to install: Our marine navigation lights, innovative design allows you to install worry-free! Unique two-way lighting function, no need to flip, plug and play, to achieve non-polarity convenient installation. Say goodbye to cumbersome, one-click lighting navigation safety Widely Used: High quality boat light bulbs are suitable for marine led lights kayak lights pontoon boat lights and interior boat lights on offshore pontoon boats, dinghies, sailboats, bass boats, jon boats, yachts nav lights for boats and more. 31mm marine led festoon bulb can also be used for boat navigation light, the front navigation lights, marine running lights, bow light, port light, anchor light, Perko running lights, bow light bulb, Perko Bow multicolor light, cboat's red/green navigation light,boat’s side lights, stern light on 1988 Supra boat, car interior map lights, dome lights, reading lights, courtesy car lights, glove box lights, trunk lights, and luggage compartment lights Package includes: 2 31mm navigation light bulbs, each 12 volt marine bulb contains 16 high-quality super bright 4014 SMDs, voltage: DC12- 24V, luminous flux: 200 lumens, width: 8.5mm (0.34 inches), length: 31mm (1.25 inches). Before purchasing, please confirm that the length of the bulb to be replaced is 31mm After-Sales Guarantee: If you have any questions after purchasing these marine navigation lights bulbs, please contact us, we provide free after-sales service Xyanmc 31mm marine led festoon bulb measure 31mm and are designed for marine navigation lights and other small fixtures Energy saving, the 31mm marine led festoon bulb 1.5w 200lm 6500k white 360 degrees beam angle, low temperature and low power consumption, lifespan up to 30000 hours, saving more energy money. Easy to install, unique two-way lighting function, no need to flip, plug and play, to achieve non-polarity convenient installation. With a 6500k white light, these stern light bulbs provide a pure and vivid illumination for a safe boating experience. High quality LED bulbs are suitable for marine led lights kayak lights pontoon boat lights and interior boat lights on offshore pontoon boats, dinghies, sailboats, bass boats, jon boats, yachts nav lights for boats and more.