I may have gotten a little ahead of myself with the spark plugs. They're necessarily very high voltage (north of 10k volts), so they come to mind easily, but I'

I may have gotten a little ahead of myself with the spark plugs. They're necessarily very high voltage (north of 10k volts), so they come to mind easily, but I'm sure the current and spark duration are quite low. Still, just the lights will easily outweigh a consumer-grade cellular modem.