Wow. Looks pretty interesting. If you have the patience to read through the following, you might get an idea here:
http://boards.theforce.net/Costuming_and_P...019/15796050/p1
and here:
http://elwirecheap.com/inligupprod.html
If you want to do it the old-fashioned way, you can use an LED, a resistor, and a battery (or two) to power a clear/tinted saber shaft. Good luck!