For what it's worth, Graham, I agree with your 'understanding', particularly that a ley line contains little or no energy and therefore cannot really be called an energy ley. We don't always have to agree with the AmericansGrahame Gardner wrote: As I understand it, ley indicates a straight line - whether it's a visual ley or an energy ley. I use 'energy line' to denote a sinuous line, such as the Michael and Mary currents.
I'm not sure about the entire etymology here, but I think that the 'energy ley' term was imported back to us from American dowsers, where it is used to describe a straight band of dowsable energy, usually about 2.5m wide. A visual ley (common: "ley line" = alignment of sites) can be dowsed for, but (for me, anyway), will be very narrow with minimal width, indicating little or no energy. An energy line (again, for me) dowses slightly wider than this, but not usually as wide as an energy ley, apart from major flows like the aforementioned Michael and Mary currents.
(mod - quotes markup added for clarity - GG)