This season, deck your halls and boughs of holly with these bright, warm and clear incandescent mini lights. The 100 Christmas light bulbs are spaced 2.5 inches apart on green wire making them the ideal lights to wrap wreaths, centerpieces, and even staircases. UL listed for indoor and outdoor use, the string averages 3,000 hours. Up to 5 sets of the 21-foot strings can be connected end-to-end. Make your season bright with these durable, reliable and festive lights.