This season let your holiday designs glow with the warmth of incandescent mini Christmas lights. The 100 frosted bulbs are spaced only 4 inches apart on green wire making them ideal for wrapping topiaries, centerpieces and tabletop trees. UL listed for indoor /outdoor use. The string averages 3,000 hours of trouble free lighting. Up to 3 sets of the 33.75-foot string can safely be connected end to end. Make your home decor bright and festive with these dependable and economic lights.