Set of 15 Multi Function LED Christmas Lights Item #39-363-00 Features: Color: color changing bulbs / green wire Number of bulbs on string: 15 Bulb size: C9 Additional Product Features: LED lights use 90% less energy Cool to the touch Advanced lighting technology allows you to select the color of lights you want! Press the button to select your choice of seven different colors and four patterns UL listed for indoor/outdoor use Material(s): wire/plastic