I haven't seen this done yet, so I wanted to give it a try:
These are small 12V Plasma Balls and I'm using a DKPinball 12V Fused Power Tap. They run continuously and I lowered the 906 socket height so that I could squeeze a comet 8SMD flex flasher below the plasma balls.
It looks cool as hell...EXCEPT....if you look closely at the picture, two of the SMDs on the flashers are continuously lit. The plasma ball is backfeeding current into the flashers! I knew that plasma balls feed tiny amounts of current (at a high voltage) into whatever touches the ball....but I didn't think it was enough to light 2 SMDs!
I turned the machine off after a minute or two as I didn't want to push my luck. I like the flexes under the balls, so I may try moving them out a bit and see if I can stop the backfeeding.
If anyone else has given this a try, let me know if you have had any long term issues...not sure if I'm comfortable leaving it as is....