Make your holiday lighting festive with a commercial LED warm white C9 Christmas light system. The system is ideal to decorate commercial displays, house trim, and fence lines and includes 25 cool to the touch and energy efficient LED faceted bulbs that are spaced 12 inches apart on 25 feet of green wire. UL listed for indoor/outdoor use, you can safely combine up to 66 sets end-to-end. This lighting system is rectified and requires one non-rectified plug adapter that is not included. UL listed for indoor/outdoor use, you can safely combine up to 66 sets end-to-end.