Christmas lights
The use of decorative, festive lighting during the Christmas holiday season is a long standing tradition in many Christian cultures, and has been adopted as a secular practice in a number of other non-Christian, or non-predominantly Christian, cultures (notably in Japan).
While the use of celebratory lighting during winter solstice festivals pre-dates Christianity, it is the European (and later North American) partly secularised traditions associated with Christmas which are now commonly recognised and enjoyed as Christmas (or festive, holiday-season) lights.
Source: Christmas lights - Wikipedia, the free encyclopedia
