Installing Christmas lights can be done by anyone with basic knowledge of electricity and safety. There are a variety of methods for installing lights, but the most common is to use a staple gun to secure the lights to the roof or exterior walls of your home. Some people also use clips or hooks to hang the lights. Additionally, some people use ladders or scaffolding to reach the top of the roof or house. It is important to make sure the lights are installed properly to prevent damage to your home or injury to yourself.