It enhances the appearance of your home and increases safety. You can probably install the system yourself in an afternoon. Be sure to call your utility company before you dig anywhere on your property.
Most companies provide a free service that marks the locations of all underground utilities.
First, determine how many lights you'll need and where they should be installed. Then identify your power source, and determine what other electrical devices are powered by it. Do not overload your circuit. Mount the transformer on the wall near the power source. The transformer should be at least 1' above ground level.