That's one heck of a lightning gun to arc 200 meters. I did some mathematics to calculate the voltage required and I got some wacky numbers like 40 billion, and that number would change dreastically depending on the shape of the conducting electrode. I do know that the average voltage of a lightning bolt is between 200,000 and 500,000, and that a lightning bolt travels around 2000 meters at its smallest distance. I'm fretting over distance because I do know that the power required to arc electricity increases exponentially as distance increases. So long as the cells are rare/expensive/prone to failure (which I'm gonna guess they are), then I bestow upon this gun a Hibou Co. Stamp of BZZZZT
Also those pics are lookin' pretty good, Z.