Lightning, is it possible to get the energy?

Ignore the other thread, the one was a mistake and actually didn't even go to the thread I asked it for. The questions are the same, quoted off of the lightning page;

The energy of electricity can directly be calculated if its current and electrical potential difference is known. If the current is a ampere and the electrical potential difference is v volt, then the power of the lightning is given as a*v J/s. Usually 1 second of this is addressed to the AP, unless the electrical flow couldn't be sustained for that long.

Is it possible to actually get the the values required to get energy (ampere and electric potential difference) without the need of a direct statement? I remember an ANCIENT CALC ABOUT LIGHTNING ENERGY, but that doesn't really help me. So... what do y'all have?


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[MusicRelaxing]

Damn, i thought the article would NOT result in that format. Damn..