This is the base needed to build your own lightsaber !
I wanted to get a lightsaber, really cheap for cosplays or decoration. I wanted something, easy to make, with no electronic circuit which has to be made each time you construct a saber.
I use a LED keyring torch as a lamp which is at the back of the saber.
-> Infapower F026 5-LED Keyring Torch
You can find the lightsabers I've made on my page : https://www.thingiverse.com/Z9ld/designs