Christmas tree lights are one of the most important decorations for your tree! They're also one of the most delicate and easy to mess up, so it's important to know how to install them properly. Start by making sure your tree is on a flat, stable surface and has enough room for the lights to wrap around it. Once you've got your tree set up, carefully untangle the lights and plug them in to make sure they're working properly. Then, start wrapping the lights around the tree, starting from the top and working your way down. Make sure to evenly distribute the lights and check for any gaps.