160 tree lights comprised of 8 strings of 20 LEDs on a green wire. They're easy to hang and remove, as they attach to the top of the tree rather than being wound around it. They also come with a timer so you can program them to come on when it gets dark. This size is made to light the length of a 4ft Christmas tree. Suitable for indoor or outdoor use. Benefits of LED bulbs: Energy efficient Consume up to 90% less power than incandescent bulbs Long LED lifespan Extremely durable and built with sturdy components