are christmas lights a fire hazard

Yes, Christmas lights can be a fire hazard if they're not used properly. It's important to make sure that the lights are UL listed, meaning they've been tested and approved by a reputable organization like Underwriters Laboratories. You should also follow the manufacturer's instructions and avoid using them near flammable materials like paper or plastic. Additionally, always unplug your lights when you're not using them and keep an eye on them while they're in use.