Christmas lights have become one of the most popular holiday decorations in the world. During the holiday season, streets are adorned with colorful lights that transform their surrounding into a lightshow of brightness and joy. Now, the tradition of Christmas lights spans centuries and continues to grow each year. The first Christmas lights date back to the 17th century, when people in Germany decorated their homes with small candles and other light sources. Later, advent wreaths with four candles were used to represent the four Sundays before Christmas. By the 19th century, the advent wreath became popular across Europe and by the early 20th century Christmas lights began to become an integral part of holiday celebrations. By the 1940s, electric lights were accessible, prompting a surge in the popularity of holiday decorations. In the 1950s, it was common for homeowners to create their own light displays with simple strings of colored lights. Today, there are hundreds of styles of outdoor lighting, from twinkling icicle lights to bright projection displays. In addition to the aesthetic beauty of the lights, there is an environmental benefit to be gained from using outdoor LED lights which are more energy efficient than traditional incandescent bulbs. No matter how you choose to decorate for the holidays, Christmas lights are an integral part of the holiday season. From the first small candles and advent wreaths to modern LED snowflakes, Christmas lights can bring a world of beauty and joy into any home.