Each turn signal kit contains two sequencing modules with 5 bullet lights each and waterproof connectors, with harness wires long enough to reach to the headlights in most cases. The lights install through the back of a 3/4" hole in up to 3/16" (5mm) metal or plastic. The lights always turn on sequentially with the turn signal, but can be wired to either turn off all at once, or turn off in sequence and then stay on as running lights. The lights in all variants are light up amber, but the lenses come in either amber or a dark gray smoked lens. To install, drill five 3/4" holes in a row. Slide the grommer down the wire of each light. Pass each light through the hole from the backside, and squish the grommets into the hole. Press the lights back into the grommets, and rotate them so the "top" indicator on the front of the lens faces up. Connect the black wire to the vehicle's ground, and the red wire to the positive of the vehicle's turn signal bulb. If you would like the lights to sequence back on after the turn signal is cancelled to act as running lights, then connect the yellow wire to the vehicle's running light circuit. Otherwise, leave the yellow wire disconnected. The light nearest the plug is the first to turn on, and the light furthest from the plug is the last to turn on.