Hello, could you please share some insights on the matters i'm about to ask. The examples will be without any numbers of real physical dimensions more like theoretical concepts. In a fluorescent lamp or gas discharge lamp the electrons flow from cathode to cathode(anode ??) as I believe they change places 50/60 times a second because the ac current does so either, but that's not of highest importance here , so the electrons flow exciting the gas(mercury vapor)) atoms which give a UV photon emission on the phosphor coating on the walls which in turn radiate em radiation in the visible spectrum at a certain wavelength. The questions is while does electrons are traveling in the lamp they not only excite the mercury atoms but create and emf right? Like every moving charge does.So if I would wrap windings of copper around the long tube fluorescent bulb would I see some voltage induced? Or in this case most if the electron energy is wasted as visible light rather than other forms of em frequencies? The second question would be , imagine a tube like (possibly made of glass) enclosure , then low pressure gas in it and electrodes at both ends of the tube. A dc current source applied to the electrodes making one cathode the other anode depending on the polarity. Now assume the voltage is high enough for the gas to conduct, when this happens again the tube has some windings wound in the middle of it would there be induced voltage/current in those windings because of the electron flow perpendicular to them?