Set of 20 Battery Operated Christmas Lights Item #241B4411 Features: Color: blue bulbs / green wire Number of bulbs on string: 20 Bulb size: mini bulb Spacing between each bulb: 6 inches Lighted string length: 9.8 feet Total string length: 11 feet 16 inch green lead cord Additional product features: UL listed for indoor use only Straight line construction This set has 20 push-in type bulbs. Bulbs do not twist Requires 2 "C" size batteries (not included) Standard batteries last approximately 72 hours before they need to be replaced Comes with a replacement bulb On/off switch located on back of battery pack Cannot connect multiple sets together Material(s): glass bulbs/wire Type: Lights Color: Blue