Installing Christmas lights around windows can add a festive and decorative touch to your home during the holiday season. Here are some steps to help you with this process: 1. Gather the necessary supplies: You will need a roll of Christmas lights, an extension cord, and some hooks or clips to secure the lights to your windows. 2. Measure the perimeter of your windows: Take a tape measure and measure the length and width of each window you want to decorate. 3. Determine the number of lights: Decide how many strands of lights you want to use and how many bulbs you want to have on each strand.