The Flatline-style lights in this bezel have 50 amber diodes, total. Functions as both a marker and a turn signal. All of the individual lights are wired together, so you only have to splice one set of wires. Fits trucks with 4″ x 6″ dual rectangular headlights, such as the Freightliner Classic, Peterbilt 379, and Kenworth W900, among others.