Yes, 5000 is greater than 80, but you haven’t yet established any reasonable means of getting 80 Joules of energy into the fuel tank. What sort of resistance do you think fuel sensors have anyway?
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Who am I to believe? Professional laboratories that documented their work, or you with your hearsay, conspiracy theories and middle school understanding of physics.
You can believe professional laboratories who say that it is possible to ignite jet fuel with 80-5000 joules of energy. Sure you can believe them that such tests will yield such results, but that's not addressing the salient question.
How do you get a 80 or even 5000 joule discharge into a fuel tank without deliberately intending to create one?