What do I use for a lightsaber?
Lightsabers in films range from plastic toys, to broom handles, to pipes. You should use whatever is most readily available to you. Make sure to a use bright color for the blade so it can be easily spotted in your film later during post production while you are adding the glow. For a reference on building your own lightsabers, please see: Building your own lightsaber. Also you can consult the Costuming and Props message board as people there are always willing to help.