Bethlehem Lighting GKI 20-Light Wide Angle Battery Operated FLEXCHANGE LED 5-Color Multi Mini Christmas Light Set Faceted cone LED bulbs with 4-inch lead, 6-inch spaces and 4-inch tail. Green cord. ENERGY STAR-certified LED lights! ENERGY STAR qualified lighting provides brilliant light but uses 75% less energy, 75% less heat and last up to 10 times longer! These LED light strings have a patented rectifier built in--eliminates unwanted tracing and ensures delivery of the truest colors possible. Unlike incandescent light sets, FLEXCHANGE LED sets allow you to connect dozens of strings together! UL approved for indoor and outdoor applications.