The 31mm Blue LED Replacement Bulb is a practical and efficient lighting solution. Sold individually, this bulb offers better illumination and can easily replace most 31mm bulbs. With its blue LED technology, it provides a vibrant and eye-catching lighting effect. Whether you need to replace a bulb in your car, boat, or any other compatible device, this LED bulb is a reliable choice. Upgrade your lighting system with this energy-efficient and long-lasting replacement bulb.