Christmas lights are usually taken down after the holiday season, typically within a few weeks after Christmas. This can vary depending on the location and the individual, as some people prefer to keep their lights up for a longer period of time. In some cases, lights may stay up through the winter months and into the new year, serving as a festive reminder of the holiday season. However, it is generally recommended to remove Christmas lights by the end of January in order to avoid potential safety hazards and to ensure proper storage for the next holiday season.