In general, LED Christmas lights tend to last longer than traditional incandescent lights. This is because they are more energy efficient and generate less heat. LED lights are also designed to have a longer lifespan, typically up to 100,000 hours of use, compared to the 1,000 hours of traditional incandescent lights. However, it is important to note that individual LED light strings can still burn out or fail over time, especially if they are exposed to extreme temperatures or physical damage.