672 tree lights comprised of 32 strings of 21 LEDs. 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 7ft 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