As it is very difficult to get under the landscape for wiring lights and whatnot, I run a 12v circuit around the frame with copper tape, one positive one negative, I run a third strip wired to the 12V positive via a 3V resistor, the gives me a 3v circuit as well. I can then run 12v or 3v power along along the surface to wherever it is needed, then hide it under roads, buildings or even the flower beds. A great benefit is that I don't need to individually fuse 3v lights etc as they can simply be wired directly to the 3v circuit. Of course the circuit on the frame will have to be covered over later for safety.