Christmas lights, also known as fairy lights, are sets of ornamental lights that are often used to decorate trees, houses and gardens in order to make a festive atmosphere for the Christmas season. Christmas lights were first created in the late 1800s in Germany. Initially simple electric candle-shaped bulbs were used, but as technology improved new kinds of lights were introduced, such as the distinctive Christmas Tree-shaped light bulb. Christmas lights soon became a popular way to decorate homes and gardens for the Christmas season. Today, Christmas lights are available in a wide range of designs, from the classic multicolor lights to laser displays and fiber optics. Christmas lights are also available in both standard mains voltage and low voltage, and are suitable for both indoor and outdoor display. Christmas lights have become an essential part of Christmas decorations around the world. They are often used around Christmas trees, but can be used to brighten up any other kind of Christmas decoration. They offer a festive and cheerful atmosphere and, of course, an iconic look for the Christmas season.