500 Bulbs Christmas fairy string twinkle warm white LED compact lights with 8 functions and green cable - 11m long Our compact lights are great for either wrapping around a tree in a spiral or to go along the front of your house, creating a full-on Christmas effect. Energy-efficient long-lasting LED lights. Suitable for indoor and outdoor use. Multi-function controller with 8 effects. Low voltage transformer. Low power consumption. The transformer must be kept indoors.