To properly wrap a Christmas tree with lights, you will need to start by planning out your design. Consider the shape of the tree and how many lights you would like to use. If you are using an artificial tree, make sure to attach the lights securely to the branches, working from top to bottom and making sure to evenly distribute the lights around the tree. If you are using a real tree, it may be more challenging to wrap the lights evenly due to its shape. In this case, you may want to start by wrapping the lights around the trunk and then working your way up.