I have a big power line behind my house that I think is one 250kv and a couple at a smaller voltage. I can get some pictures if you want a better guess. The bottom line is I tried every urban legend anyone could come up with (coils, long wires between the poles, vertical antennas etc). I never got an F40 tube to glow and I was up on the right of way. If I could have made it work it would be lighting my boathouse tonight.