Set of 20 Battery Operated LED Christmas Lights Item #X5W2107 Features: Color: yellow bulbs / white wire Number of bulbs on string: 20 Bulb size: concave wide angle (mini bulb) Spacing between each bulb: 5 inches Lighted string length: 8 feet Total string length: 9 feet Additional Product Features: Lights are equipped with lamp lock feature which makes them replaceable interchangeable and keeps them from falling out Uses 90% less energy Super bright bulbs guaranteed to light Cool to touch non-glass bulbs Replaceable bulbs and fuses included UL listed for indoor use only Straight line construction This set has 20 push-in type bulbs. Bulbs do not twist Requires 3 "AA" size batteries (not included) Standard batteries last approximately 72 hours before they need to be replaced - bulbs themselves will last tens of thousands of hours On/off switch located on side of battery pack Cannot connect multiple sets together Material(s): plastic bulbs/wire Type: Lights Color: Yellow