To start a Christmas light business, you will need to have some basic knowledge of electronics and lighting. You will also need to have a good understanding of marketing and business management. Once you have all of the necessary skills and knowledge, you can then start by developing a business plan that outlines your goals and strategies for success. You will also need to research your target market and determine the type of Christmas lights that are in demand. With careful planning and execution, you can build a successful Christmas light business that brings joy and beauty to the holiday season.