You can also consider my Hyperblade conversion:
http://www.hyperdynelabs.com/hyperblade
It's hands down the brightest blade available (even brighter than the venerable plasma blades). You can also duel with the blade, as it was custom engineered to take a beating.
Features include proper ignition/retraction effect, plug and play sound modules, CorePulse "pulsing" blade effect, MovieFlicker effect (emulates the original trilogy saber effect), bright blade flashes upon a clash event, programmable blade brightness, programmable blade ignition speed, etc.
I pride myself on offering very high-end saber solutions, so I know its not for everyone. I also engineered the blades to look like they do in the movies, so any camera shots or video are hard to see some of the effects (since the blades are so bright they tend to saturate all cameras I have tried so far). Heck, I've even been accused of photoshopping all the blades in my pics (by some of the Luxeon guys) - which is a compliment I suppose. :lol
At any rate, we are almost ready to offer up conversion services. And with our setup you can definitely do something that is for display only. In fact we are working on such a display for the LFL X-wing fighter... It will have a motion sensor to activate the saber, and it will stay on as long as you like.