This set of 500 LED string lights are set out on a green cable which helps to blend them well into your Christmas tree. Featuring 3 times as many LEDs per meter as regular lights, they will create a beautiful cluster effect when lighting up your tree. The bulb spacing along the set is 2.5cm. With their multi action feature and timer setting, the lights can be set between 8 of its lighting functions including a static setting, which will light up automatically for 8 hours and switch off for 18 hours at the same time each day. So, you won't need to worry about remembering to turn them off every time! The lights have a large 12.5M lit length range and are specially designed for trees up to 1.5M (5ft) in height with a 5M lead cable. Suitable for both indoor and outdoor use, these eco friendly LED lights are the perfect addition to lighting up your tree or garden during this festive season. Saving you 90% on energy costs too! (Transformer must be located indoors or in a weatherproof box).