Christmas lights on siding? Now that's something I've never tried before. Let's see......well, first you'll need to measure out the length of the lights you want to use. Then, you'll need to find the right kind of clips or hangers to attach them to the siding. Once you've got those in place, you can start hanging the lights up. Make sure to keep them nice and secure so they don't fall off or come loose in the wind. And don't forget to test the lights before you turn them on to make sure everything works properly!