The Plasma puts out a vast array of different frequencies, so I am certain there are some EMFs created. The good news is that since Spooky2 is varying the frequency constantly and using dynamic carrier technology, the frequency doesn't stay in one place for long, so it is far less damaging than any radio signal where the frequency is constant.
It shouldn't cause damage to anyone. However, everyone in the range of the bulb would need to be monitored for effects, as plasma will "help" all within range and we don't want to provide too much help to anyone and cause excessive herx. reactions.
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