Lightsword Ultra "intensity" issues

I'm doing a lightsaber battle, but I've noticed that my opposing lightsabers apparently share a "heartbeat."
I've looked at everything I could think of, (seed, frequency, etc) but I cant seem to find a setting that will make the sabers "off beat"
Any ideas?
Comments
Which particular light sword effect are you using here? Changing the Seed of the flicker for each effect to a different value is the quickest way to get them out of sync, but you could also use different flicker settings for each effect, if you want to adjust them further.