Waterproof Design: The Christmas lights are IP 44 waterproof, making them suitable for indoor and outdoor use. Long Lasting: Each bulb has a 2,500 hrs lifetime, providing long lasting illumination for your holiday decor. Safety Features: Includes a built-in 3A fuse for safety and is UL certified. Versatile Usage: Perfect for decorating homes, porches, gardens, patios, pathways, balconies, bathrooms, trees, fences, wreaths and more. Easy Installation: Each set of lights includes male and female plugs that can connect up to 6 sets for a total of 480 lights. 100 Count Christmas String Lights