Prepare your semi truck to be Ready for the Road Ahead™, with the Betts Industries 4" Oval 6-LED Marker / Clearance Light that delivers enhanced lighting performance. Due to its ability to generate a bright, vivid light, this replacement lens is able offer better luminosity and efficiency than traditional rear or tail lighting. Constructed with a multipurpose design that can be suitable for a 12 or 24 volt adjustment. FleetPride is your First Click in Heavy Duty®.