backyardfx is correct, and thankyou mandalorian for you comment. No, I don't plan for electronics but I've never really thought of that possibility...Guess that would be a good weekend project.
Lightsaber electronics are the best, but can be a little pricey at times. thecustomsabershop.com has lots of good stuff for all your lightsaber needs if you have the extra cash to throw around.
Here's a picture of some of mine. The top one is one I made from all TCSS parts.
These are also lots of fun because they're durable enough to fight with.