oneTesla update: Kramnik is magical

...because oneTesla was never supposed to be able to do this:

2' of spark!

I believe that's something like a 2' ground strike off a 10" tall secondary.
All credit goes to Daniel Kramnik for figuring out to make the coil do that (something about less coupling, more current). FGH60N60SMD's are also pretty good - 300A and I've yet to see any damage.

Long Exposure

Ground Strike

I <3 Ultrabright Green LED's