The LED light source consumes up to 85% less energy and lasts 10 times longer than incandescent bulbs.The LED candle gives a cosy flickering light like a real candle. It is a safe alternative for homes with children, and can be used as a decorative light anywhere without the risk of fire.Batteries are sold separately; 2 pcs AAA required.Only for indoor use.IKEA recommends LADDA rechargeable batteries.New, fully-charged LADDA AAA 900 mAh rechargeable batteries give 48 hours of light. One charging will last approx. 8 days if used 6 hours per day.Built-in LED light source.LED life time approx. 20.000 hours.Light colour; warm white (2500K Kelvin).