Ensure your semi is Ready for the Road Ahead with bright flashing lights for warning or emergency situations, with the HD Value 3-5/8" LED Permanent Mount Beacon Light. By using an alternating pattern that provides enhanced stability, this replacement light alerts other workers, drivers, or spectators of a delicate situation. Built with a sturdy outdoor body to perform its best in all types of climates. FleetPride is your First Click in Heavy Duty .