IKEA STRÅLA Battery Operated LED Pendant Lamp Ring Shaped Wreath 605.629.74 "Easy to place anywhere as it is battery operated and does not need to be connected to the main supply." A built-in timer turns the lights on at the same time every day and keeps them on for six hours. Requires 3-AA batteries, (Batteries Not Included.) Polypropylene plastic and ABS plastic. Designer: Zhelin Lian. Diameter: 15 " (37 cm) Luminous flux: 8 Lumen (8 Lumen) Estimated life: 20000 hr (20000 hr) Materials Battery box/ Support bracket/ Ring: ABS plastic Screw: Polyamide Protective pad/ Switch cover: Synthetic rubber Cord anchor: Polycarbonate plastic Decoration: Polypropylene Only for indoor use. Built-in LED light source. LED life approx. 20,000 hours. Light color: warm white (2700 Kelvin).