What evidence is there to prove or disprove if they work? Often there is a storm in the middle of the night (last night for instance) when I woke up hearing a loud crack of lightning very close. Apparently no homes burned down, no sirens. Quite a few of the homes in my area do have lightning systems so maybe one was stuck but the system worked. Unless there is a witness to a direct strike how do we really know? I imagine over the years at least a few people in TV must have witnessed one of these events.
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