Heavy duty warning lights signal your presence to other drivers. Whether you need to pull over to the side of the road, drive slower than usual, get through bad weather, or light up a work area, these heavy duty truck parts will keep you and other drivers safe.FleetPride offers a large inventory of semi truck and trailer warning lights. We carry strobe lights, strobe light bars, LED light bars, trailer light bars, LED beacon lights, LED flasher relays, LED directional lights, LED pedestal lights, and strobe light heads. Browse our diverse assortment to find what you need.