Photo credit: mrclean
Not only do solar-powered outdoor lights save energy, but they also save you the hassle of digging ditches, laying wires, and connecting them to an electric grid. Solar lights use photovoltaic cells that harness the power of the sun to create energy, which is then stored by rechargeable batteries until it's called upon to power the LED bulbs at night (not unlike King Arthur reawakening in England's time of greatest need).
Mother Earth Living has the 411 on how to choose among the three kinds of garden solar lights available, depending on whether you just want standard path lights, something a little fancier, or spotlights that will give you focused lighting. ::Mother Earth Living
Difficulty level: Easy