Overview
Two systems working the same yard.
Outdoor lighting is really two systems installed together. The first is low-voltage: a transformer mounted on the house steps power down to around 12 volts and feeds buried cable out to path lights along the walk, uplights on the trees and the front elevation, hardscape lights tucked under a wall cap, and step lights on grade changes. The second is line-voltage - the wall sconces flanking the door, soffit downlights washing the driveway, and floodlights covering the side yard and the back gate.
Getting either one right is mostly about what's underneath. Low-voltage systems fail in predictable ways: cable too small for the run, so the far fixtures come up dim; every light daisy-chained onto one leg; a transformer sized to the fixture count on the box instead of the actual load; connections twisted and taped instead of properly waterproofed. Line-voltage exterior work fails differently - receptacles without in-use covers, cable buried too shallow, fixtures that were never rated for a wet location sitting where the rain hits them.
We plan the whole exterior at once: what needs to be lit for footing and safety, what's worth lighting because it looks good at night, where the outlets need to be for string lights or holiday displays, and how the whole thing turns itself on and off. Then we install it so Oklahoma weather doesn't take it apart over two seasons.