Outdoor lighting isn't one thing. It's three jobs sharing a yard: lighting the path so you can walk it safely, lighting the property so it isn't dark and exposed, and lighting the architecture and landscape so the home looks the way it should after sunset. Each one wants a different fixture, a different beam, and sometimes a different circuit.
All of it lives outside, which changes everything. Every circuit has to be weatherproof, every connection has to be sealed against the desert, and every outdoor receptacle and circuit needs GFCI (Shock Prevention) protection, because water and electricity end up in the same yard.
Low-voltage landscape light runs on a transformer that steps 120V down to a safer 12V, which is why it can sit safely among the plants. Path, security, and architectural fixtures each ask for a different placement and beam. Done right, you don't notice the fixtures. You notice the home.