String lights, also called fairy lights, are a type of light that is commonly used for decorative purposes. String lights typically consist of a series of small bulbs that are connected together by a string or wire. These lights can be used to decorate various things such as trees, gardens, buildings, and even people.LED String lights can be used for other holidays and occasions as well. For example, string lights can be used to decorate Christmas celebrations, a wedding ceremony or reception venue. Additionally, string lights can be used year-round to add a touch of decoration to any home or office space.