Solar lights are one of the most popular cheap options for outdoor lighting. They're easy to install and cost-effective.
 
Solar lights have no wires since they run on batteries that charge during the day with solar panels on top of them. The light output from a solar powered fixture depends on how much sunlight it receives during daytime hours based on which location the panel faces (i.e., northern vs southern).

HOWEVER, solar lights lack a long life expectancy as they are on whenever they are charged, so you may find yourself replacing them more often than you would like. With the minimal cost of running low voltage lighting, and a timer controlled transformer, and and long lasting LED lights the change definitely pays out in the long run.. Running professional low voltage landscape lighting will not only look cleaner, but it will outshine and outlast any store bought landscape lights.

And hey! When you have us install your system your light fixtures come with a lifetime warranty!