Set of 35 LED ColorWave??? Christmas Lights Item #41499 Features: Color: Bulbs change from red to green / green wire Number of bulbs on string: 35 Bulb size: M5 (mini light size) LED lights Spacing between each bulb: 4 inches (10.16cm) Lighted string length: 11.33 feet (3.45m) Total string length: 12 feet (3.66m) Additional Product Features: ColorWave??? is a patented technology using LED's to create a magical mesmerizing lighting effect. Each individual bulb fades gradually from red to green and the shades inbetween. Cool to the touch Bulbs are connected with the socket and are not replaceable. This construction is more reliable than screw-in bulbs because it keeps lights from falling out. Injection molded moisture-resistant construction Over-molded husk creates a 1-piece design to protect circuitry Uses up to 98% less electricity UL listed for indoor/outdoor use Rugged non-glass bulbs wont break Bulb covers do not fade chip or peel Water and weather resistant Each string is 4.8 Watts End-to-end connectors allow you to connect multiple sets together (not to exceed 210 watts) Please note that all of the bulbs change simultaneously. You can connect multiple strands and they will synchronize when changing color.