Well this is more that twice the size I wanted the rod to be but this is as small I can go and still have space for the stupid batteries. It's still small enough to holster on my belt but is going to be sword size. I guess that's fine.
The fat centre piece is for the batteries and switch. It will be wrapped in leather and I can just squeeze my hand to turn it on and off. The rod will be black with runes carved into it letting light through from the LEDs. That is if I don't fuck it up. I have enough of the tubes to make one more attempt.