The Treasure Garden Luna umbrella light has self-adjusting design that fits almost all umbrella poles. When the umbrella light is fully charged it can provide light for up to 6 hours. This umbrella accessory is powered by 16 long lasting LED lights that will last at least 30,000 hours. The umbrella light also includes a AC adapter and a rechargeable battery. The Luna umbrella light is an excellent addition to your patio this summer to shed a light on your entertaining.