Cats are often fascinated by bright and colorful lights, so it's likely that they would be intrigued by Christmas lights. However, it's important to keep in mind that cats are also very curious and playful animals, so they may try to play with the lights or chew on the wires, which could be dangerous. If you have a cat in your home during the holiday season, it's important to supervise them closely and ensure that they don't get into any trouble.