Low-voltage landscape lighting runs at twelve volts through a transformer rather than at line voltage, and that single difference changes almost everything about how the system is designed, installed and lived with.
The safety margin is the obvious benefit. Twelve-volt cable buried in a planted bed is dramatically more forgiving than line-voltage wiring when someone puts a spade through it while planting. It is also why the burial and conduit requirements are lighter, which keeps installation cost down across a large garden.
Flexibility is the benefit people appreciate later. Gardens change. Shrubs that were accent-lit at planting become overgrown in four years, and a bed that was empty becomes the focal point. A low-voltage run can be extended, re-routed or have fixtures relocated without re-trenching the whole scheme.
The design constraint to respect is voltage drop. Twelve volts does not travel far before the far end of the run visibly dims, and the usual symptom is a garden where the fixtures near the transformer are bright and the ones at the back look tired. The fix is proper cable sizing, sensible run lengths, and hub or loop wiring rather than one long daisy chain. This is the part that separates a system that still looks right in year five from one that does not.
Transformer sizing matters for the same reason. Loading a transformer to its absolute capacity leaves no headroom for the fixtures you will inevitably add, and running it hard shortens its life. We size for the current scheme plus realistic expansion.
In the high desert there is one more consideration: heat and grit. Fixture housings, connectors and the transformer enclosure all need to be genuinely rated for the exposure they will get, and connections need to be made with waterproof connectors rather than the twist-caps that come in the kit. That is the difference between a system that survives Palmdale summers and one that fails intermittently every August.
If you are considering landscape lighting, we will walk the garden with you, plan the layout and the runs, and put a free written estimate together — including what the system should look like once it is expanded.