Wrap your wreaths, metal and wooden arches, and topiaries in this red mini Christmas light set. The 100 incandescent bulbs are spaced only 2.5 inches apart on green wire making them perfect for impact lighting. UL listed for indoor and outdoor use, the string averages a life span of 3,000 hours. Up to 3 sets of the 21-foot strings can be connected end-to-end. These mini lights make festive and elegant lighting designs for any holiday or event.