Abstract: A clearance and side marker lamp, or PC lamp, such as for truck/trailer combinations, is provided with LEDs mounted to a plurality of circuit boards. The circuit boards are mounted at predetermined angles relative to each other for directing light in at least three directions. A lens is provided in front of the LEDs and includes a series of prism optics for spreading the light emitted from the LEDs into an arc of up to 180 degrees.

Abstract: An electronic self-canceling turn signal device for use with a motor vehicle, and most advantageously a semi-tractor/trailer, having turn indicators or indicator lights providing numerous features. The electronic self-canceling turn signal device provides for the driver of the vehicle to make a wide or sweeping turn maneuver in an indicated direction by initially turning the vehicle in a direction opposite or counter to the indicated turn direction and then executing the indicated turn without canceling the indicated turn signal. The electronic self-canceling turn signal device further provides a time delay between the point in time a tractor completes an indicated turn and the time that the electronic self-canceling device cancels the indicated turn signal so that trailers pulled by the tractor will complete the indicated turn before the turn signal is canceled.

Abstract: A lamp, such as for truck trailers and/or tractors, is provided with LEDs mounted to a circuit board placed in a housing. The LEDs and circuit boards are fully embedded in a resin material cured with thermally conductive particles suspended therein for conducting excess heat to the outer aluminum housing and the outer environment. The lens cover has a series of parallel, elongated lens ribs providing constant optics while allowing additional LEDs to be positioned in a row behind a lens rib. The LED circuit board has large traces to enhance heat dissipation.