First of all sorry for my English, you can use the subtitles if you can't understand me and If you know spanish you can check my original spanish version:
https://www.youtube.com/watch?v=yArgA64lEic
I hope you like this video and that will help some people for taking ideas for making their own versions.
there I let you the material list that I used:
-25cm of Iron tube of 30mm of EXTERNAL diameter
-10cm of Iron tube of 31mm of INSIDE diameter
-85cm of Plastic tube of 30mm of EXTERNAL diameter
-85cm of Plastic tube of 16mm of external diameter
-170cm of RGB LED strip (I recomend you the 5050SDM)
-1200mAh 3S LiPo airsoft battery (you can use an other one)
-Dean connector
-wires
-packaging plastic
the approximate price of each lightsaber is about 40€ depending there you purchase the materials.
the batteries I used: http://goo.gl/elpRQF