I'm sick of these debates over the ultimate ignition...

All seriousnous aside, I thought the OP was all April Fools an' such. I have never HEARD of a krytron tube. Well they are REAL. Real and also radioactive!!!

I have seen this one before, an effort by Tung-Sol using a Thyratron tube. I believe at one time, there was a better article

Thyratron tubes were used in my day to trigger pulse radar transmitters. Very high voltages and very high (in some cases) peak power. They are the high power, high voltage and "vacuum tube" (actually gaseous filled) equivalent of a modern SCR solid state switch.

https://www.worldphaco.com/uploads/THE_TUNG_SOL_EI-4_CDI_UNIT_FROM_MOTION_Inc..pdf