I"m trying to find a plasma ball object or something online for you. If I find something I'll post back. Also, you could use the hi res ball in the poser primatives, position it where you want, apply a glass texture to it to make it see through and then do a bit of post work on it to make it glowing.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi