C9 cords offer an economical solution for string lighting indoors or outdoors. These popular string lights are available in green, black or white cord in varying lengths. Choose from 12", 24" or 36" socket spacing to meet your needs whether for indoor and outdoor use. C9 string light cords have the widest range of usability such as Christmas lights, wedding lighting, backyard parties, patios, etc. The cords are used with C9/Intermediate/E17 Base Bulbs.