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 Note A built-in timer turns the lights on at the same time every day and keeps them on for 6 hours. Batteries are sold separately; 3 pcs AA required. Only for indoor use. Built-in LED light source. LED life approx. 20,000 hours. Light color: warm white (2700 Kelvin). Only use batteries that are intended for the product. Do not mix old and new batteries, different brands or types. IKEA recommends LADDA rechargeable batteries. This product bears the CE mark.