Our 12-volt landscape fixtures take power from a weatherproof, flexible two-wire cable. The Landscape 12-Guage Lighting Wire (100') can be used above or below ground, and generally does not need to be housed in conduit or buried as deep as 120-volt wiring. Its stranded composition makes it flexible for easy installation and relocation. Measure the distance from the last fixture on the run to the transformer to calculate the amount of cable needed. Add 1-2 feet of cable per fixture to allow for repositioning.