No Electrical Experience Necessary
Since most outdoor lighting is low voltage, it's safe and easy enough for any DIYer to install. In fact, the only special tool you'll need is a wire stripper.
Install Underground Wiring After Planting
To prevent accidental cutting of wiring for ground-level fixtures, install wiring after your landscape has been planted. That way you won't accidentally chop through it with a shovel. Also, don't install wiring in digging areas like garden beds, and be sure to bury low-voltage wire at least 6 in. below the surface.