Use an automatic timer or photocell that will turn lights on and off during off-peak times.
Conceal lights below or behind bushes so that it looks like you're seeing them on a country ridge at dusk.
Uplights at the base of trees and shrubs add to the impression that if a prowler sets foot on your property, someone is going to notice. For good measure, make sure your outdoor lighting illuminates security cameras (actual or fake.)
