I do this professionally, and his description is exactly how we do it, except I have a $400 Fluke meter. A bit of testing and basic arithmetic, some searching o

I do this professionally, and his description is exactly how we do it, except I have a $400 Fluke meter. A bit of testing and basic arithmetic, some searching on Amazon, and I have some LEDs and resistors next day. Because 64 volt electronics are hard to come by.