How could the Oxygen atom be stripped of at least 4 electrons and excited at the least to it's 4th energy level? I came across a device which claims to do this with Solid State Lasers (LED's) and a high voltage oscillating field....Just wondering how it would work since LED's only go to about 200nm. The inventor of the device claims Resonance is induced in the electrons of the atom, High voltage fields ionize the atoms, and the LED's increase the atoms energy level in cascading steps. Can anyone tell me how the ways this could be done using common parts and methods. I was thinking the best way perhaps would be to use photoexcitation and high voltage fields to create a electron avalanche which would cause collision ionization and excitation of the atoms. What other ways could this be done???