Charming Christmas Lights: The illuminated section of the outdoor Christmas lights spans 18.5 ft, with a 1.5 ft leading wire and a bulb spacing of 2.25 inches. Each bulb works at a voltage of 2.5V/0.42W, ensuring safety with a built-in 3A fuse. The package includes 1 x 20ft mini string light, 1 x spare fuse, and 4 spare incandescent bulbs. End to End Connectable: Each light set is equipped with a male and female plug, enabling connectivity of up to 6 sets (Maximum 600 Count). This allows for a maximum string lighting length of 120 ft, providing ample coverage for various decorative scenarios. Each bulb comes with a lifetime of 2,500 hours, offering commendable durability. Waterproof Outdoor Lights: Featuring a waterproof design, these string lights offer great durability, making them perfect for indoor and outdoor decorative lighting. They can effortlessly endure heavy rain or snow, proving to be weather-resistant. However, remember to keep the plug protected from water! High Quality: The Christmas tree lights come with a built-in 3A fuse and are UL certified. Each bulb operates independently, ensuring that the rest will continue to function even if one bulb is defective. Simply replace the faulty bulb with a spare one. Exquisite Christmas Lights: These bright incandescent Christmas string lights are suitable for indoor and outdoor decorations, including homes, porches, roofs, gardens, patios, pathways, balconies, bathrooms, trees, fences, and wreaths. They are the perfect addition to holiday, birthday, festival, wedding, and Christmas party decorations. TW SHINE Christmas String Lights, 20FT 100 Count Incandescent White Wire Christmas Mini Lights, Waterproof Xmas String Lights for Outdoor Indoor Home Party Yard Decorations, Red