Ikea Solar Table Lamp- Sunnan Helps you save energy and reduce your environmental impact because it is powered by a solar panel that converts sunlight into electricity. Easy to use because no cords or plugs are needed. The LED light source consumes up to 85% less energy and lasts 20 times longer than incandescent bulbs. This lamp emits 40 lumens, which is approximately equal to the light emitted by a 15-watt incandescent bulb. Includes 3 rechargeable batteries (AA 1.2V) that store energy from the sun. The batteries can be replaced and last a minimum of 2 years.