Get your semi Ready for the Road Ahead with bright flashing lights for warning and emergency situations, with the Truck-Lite 4" Round 42-LED Strobe Light Kit. To alert other spectators, drivers, or workers of a delicate situation, this replacement light utilizes an alternating pattern that provides enhanced visibility. Fashioned with a rugged outdoor body to perform its best in all types of weather conditions. FleetPride is your First Click in Heavy Duty .