Ah, changing fuses on Christmas lights! It's a simple but important task that can prevent electrical issues and keep your lights shining bright throughout the holiday season. First, unplug the lights from the power outlet and wait for them to stop glowing. Then, locate the fuse box near your main electrical panel. Inside the fuse box, you should see a row of fuses, each labeled with a number or name to identify which part of the house they control. Find the fuse labeled "lights" or "Christmas lights" and carefully pull it out.