An umbrella column with 2.5cm-4.5cm diameter can be clamped. SUPER BRIGHT - Patio umbrella lighting Made of durable ABS material; outdoor umbrella lights designed with 28 energy-saving LED bulbs, led energy saving and environmental friendly; WIDELY APPLICATION - Patio umbrella lighting kit suitable for camping, BBQ, play cards, or sitting in the yard in the evening with your families or friends, and so on; Mounted face down for direct lighting or face up for indirect lighting WIDELY APPLICATION - Suitable for camping, BBQ, play cards, or sitting in the yard in the evening with your families or friends, and so on; Mounted face down for direct lighting or face up for indirect lighting BATTERIES OPERATED - 4 AA batteries operated (NOT INCLUDED); One set of batteries lasts about 10 hours (28 LEDs) to 24 hours (4 LEDs), depends on the battery you used. LED light life span is more than 100,000 hours Color:Black How many times have you found yourself sitting around thepatio table in the evening, reading your favorite books and shielded by theumbrella, only to call it a night when the sun goes down? Or, having a dinneror talk with with your families or friends in the yard. Easy to install:No need for extra tools, wires and electrical source.Convenient for you to carry and use. Durable: LED lifetime: 100000 hours.One set of batteries lastsabout 10 hours (28 LEDs) to 24 hours (4 LEDs), depends on the battery you used. Specifications: Material: ABS plastic Powerful Lumen:220 lux Dimensions:Diameter 135MM,thickness 20MM, middle hole48MM. The light fits umbrella pole from 35mm to 43mm indiameter with the adjustable clamps included. Package included:1x 28 LEDs Umbrella Light