The fender didn't come with a taillight and the 650's stock taillight wouldn't fit inside the rear of the fender so I spent a whopping $2.29 on an LED "marker" taillight. It's about 4 inches wide and has 6 LEDs in it. At first I was concerned with the brightness, it being so much smaller and all. However, don't worry, it's not a problem! I plugged it into my 14.4v power supply and almost went blind it's so bright! The dang thing is a lot brighter than the stock tail/brake light. With a supply voltage of 14.4v, the light draws 1.6 watts. I'm going to add a 150 ohm resistor in-line with the power for the running lights so it will brighten when I hit the brakes (brake lights will bypass the resistor). With the 150-ohm resistor in-line, the light draws 0.6 watts.