These ready-to-hang C9 LED light sets are sure to be a hit this season. These pre-lamped strings feature extra-long bulb spacing and commercial-grade, non-removable LED C9 bulbs. Because each set is 25' long with 12" between lamps is a perfect way to decorate larger trees and rooflines, connecting multiple strings end-to-end. These sets use one-piece non-removable bulbs. Therefore failures due to broken, damaged, removed, or burnt-out bulbs, are eliminated. Brilliant C9 LED Christmas string lights have high-quality, built-in, full wave rectifiers, making them extremely bright without any flicker. Connect up to 43 strings end-to-end. UL Listed for indoor and outdoor use.