It turns out this 'charge' or whatever that was creating the
spark melted my 3.3V cable and disabled the entire power supply.

I have now disconnected it and installed a different one, this
time with 1N60 diodes... and the display has ended.

Where it is now sparking I have no idea... unless its being
built up as electricity in the ground around here and attracting
the danger of lightning. ?

The seemingly burnt out supply seems to have started working again.

Here I've recorded the event with the bank of diodes connected,
and a block of wood to help with the exposure.

Radiant Event from Coil (part-2)

This is my big point of interest... without the
coil in place, the radiant energy that forms between
the contacts is not present, as well as if a 1N60
diode is used where the 3V supply begins. Where it
ends up in the case of using diodes has me confused.

This is a coil I pulled from a 15 watt fluorescent tube -

The two leads are mostly intact... one is a bit wobbly, so
I'll likely give it a bit of solder.

Ultimately what I'm going to see is if a large enough spark
can be generated to be worth collecting on peripheral copper
mesh or thin film.

The video demonstrates what is produced by 3.3V and my small
hand-wound coil built on the leg of an LED.

I'll be reworking the design so as to have one side of the
contact pointing right at the other like in a Gray's Tube, and
begin by using 12V.