Turns out landscape lighting isn't too hard to install. I needed to buy a transformer, a timer, some lighting cable, waterproof lighting wire connectors, and then the lights themselves — FX Luminaire SP (Standard Premium).
A little bit of research and speaking with the helpful sales manager at The Urban Farmer Store put me in the right direction.
I'm probably going to install some uplights at some point to highlight a couple of trees. It's not a bad do it yourself project and I probably saved a thousand dollars or so doing it on my own.