Bring back the memories of holidays past with these blue incandescent mini Christmas lights. The twist-proof, anti-theft bulbs are spaced 5.5 inches apart on green wire, so they are ideal for decorating trees and will nestle in wreaths, garlands, or centerpieces. UL listed for indoor and outdoor use, the strings average 3,000 hours of trouble-free lighting. Up to 3 sets of the 46-foot strings can be safely connected end-to-end. Wrap your home designs in enchantment this holiday season with these crisp, sparkling blue lights.