This is a highly modified version of the 14-piece lightsaber from the Ultimaker site. It has been simplified somewhat, to 8 pieces, and modified for electronics. There are 7 LEDs in the lightbulb part, a 5W laser in the emitter and switches for both in the knobs piece. The STL files have been separated into basic color, but you may want to separate them further, depending on your printing style. Have fun!