Hi, I am trying to find a detailed explanation of how a plasma globe works but can't find any detailed info on the web. From what I have read it seems to suggest that the electrode at the center creates an alternating voltage which emits high frequency radio waves. These radio waves ionize the noble gases present in the globe which creates a conductive pathway to the outer glass of the globe. Electrons then flow from the electrode to the glass sphere transferring energy to the ionized gases which emit visible colored light and turn into plasma. I have a few questions which I can't seem to find anywhere: Where do the electrons come from that travel through the gases - I would guess they come from ac current from the house supply? So if you touch it does this mean ac current is flowing through you? Why is there a potential difference outside the globe (which is proved by bringing a bulb near it) as surely the glass tube would be at zero volts as this is where the plasma sparks end? When you hold a fluorescent tube in your hand it FULLY lights up. Why does this do you no harm because if its at the same brightest it would be if it was connected to the mains wouldn't it have the same energy flowing through it (P= VI)? Many thanks to any help offered!