Similar to a Tesla coil, this circuit can power fluorescent bulbs without being able to deliver much current to the user. The 1 picofarad capacitor is the parasitic capacitance of the air and is needed for the simulation to work properly. If you build this yourself, there is no need to include it.
Inspired by ElectroBOOM, his video on the Slayer Exciter is here:
https://www.youtube.com/watch?v=KzSoabcQYMg
