Super bright LED panel installs behind existing lens and uses use the upper and lower portion of the lens to illuminate the entire lens from top to bottom. The dual function assembly serves as a taillight & bright stop/turn signal. Easy plug-n-play connection into your standard 1157 socket requires ZERO modification to vehicle. Molded to fit original housing with foam padding and tabs to secure lens in place. Complete vehicle LED conversion will require addition of an electronic flasher due to small voltage draw. Sold each - order (2) per truck.