Brightever Commercial 500 FT C9 Green Christmas LED Light String – E17 Sockets. Does not come with SPT-1 plugs. Brightever Commercial Grade C9 Christmas String Lights, 500FT long with 12inch spaced bulk spools. Each spool has 500 sockets for indoor and outdoor use, as well as for Christmas lights, house roof lines, or outdoor patio lighting. Our C9 Christmas Light Spool are made from quality materials to ensure durability and longevity, making them a reliable choice for indoor and outdoor holiday lighting. Designed with convenience in mind, these spools can be installed quickly and easily (plug not included). Whether you’re decorating your home, office or event space, setting up these lights is a breeze. With lengths of up to 500 feet, the spool offers versatile decorating options. Whether you’re looking for a classic holiday look or want to get creative with a variety of lighting designs, you’ll have enough lights to realize your vision.