Like visions of sugarplums, these blue incandescent mini lights will bring back memories of holidays past. The 50 Christmas light bulbs are spaced 2.5 inches apart on white wire, so they are ideal for wrapping wreaths, wire frame designs, and topiaries. UL listed for indoor and outdoor use, the strings average 3,000 hours for years of trouble-free lighting. Up to 10 sets of the 10 foot strings can be connected end-to-end. Wrap your home designs in enchantment this holiday season with these crisp, sparkling blue lights.