Christmas lights, also known as festive lights, are lights used for decoration around the festive season, most popularly for Christmas and sometimes Halloween and other occasions. Christmas lights come in a variety of styles and colors suitable for decorating indoors and outdoors. Indoor Christmas lights are usually used to decorate Christmas trees and mantles while outdoor lights are used to outline roof lines, walkways, shrubs and trees. LEDs are the most popular type of light used in modern Christmas decorations. LEDs are not only energy-efficient, but also emit a much greater brilliance with more evenly dispersed light. The most common colors for holiday lights are white, red, blue, and green. Christmas lights can also be used to create magical lighting effects that can transform an ordinary outdoor space into a festive winter wonderland. Popular decorations include lighted snowflakes, reindeer, Santas, angels, and even Christmas trees. Many people also enjoy stringing the lights across rooflines and along walkways and then using the lighted strands to spell out Christmas messages or create lighted shapes. No matter the type of lights or decorations you choose, Christmas lights can bring an extra level of cheer to your holiday season and the winter months ahead. Whether you choose to decorate indoors or outdoors, Christmas lights will bring a warm and magical glow to your home or garden.