Originally Posted by Ar4gOrN
Yeah they use colored sticks and shine a certain FX light on them and then transfer the effect to the film.
But to get back on topic, I once saw 3 FX lightsabers at Best Buy right after Episode III came out. One was Obi-Wan's lightsaber, one was Yoda's, and the last one was Vader's. They were all $200 though >_<
i have an obi wan fx but in the movies they use alluninum swords, not sticks