I designed a rod to go along with the wand head. It's got 4 holes on the side through which a set of wires can be run. When you touch both exposed wires, the crystal on top slowly brightens to full. When you release it, it dims out gradually. The speed of the lighting changes depending on the conductivity of your skin. So if your hands are really dry, you might have to wait a little while before you see it light.
I uploaded the shaft as a single piece and as two interlocking pieces in case you don't have the height in the build area. For whatever reason, the top half of the shaft isn't displaying right. If you're having trouble downloading it, shoot me a PM and I'll send it to you some other way.
Also, I redid the crystal to allow for more space inside to fit the LEDs. No infill there as it will mess up the light dispersion.
You can see it in action here
Make sure that no supports are placed in the wire holes or the interior of the crystal because they're hard to get out and unnecessary.