Plasma sparks in vacuum (siringe)

[Khwartz]

Very interesting vid! thanks for sharing :)

[vox1philippines]

that is cool.

[vox1philippines]

that is cool......

[bigboy4006]

You can get the same effect by hooking up a Tesla coil to an incandescent light bulb. I've done it the way I describe, but a spark doesn't occur unless you put a finger on the glass envelope of the bulb.