Light bars notify pedestrians and oncoming traffic of Rural Mail Carrier presence. They easily mount onto vehicles securely with magnets. Be safe on the road with the Halogen Light Bar, excellent for mounting on LLVS and other postal vehicles, as well as forklifts, mules, and other powered facility equipment. Each light features a 10 ft. cord with plug and dual rotating 12 volt halogen light bulbs that omit and amber light. Ships USPS.