Practical Solar Charging: each solar powered tea light is equipped with a rechargeable battery, which can be under direct sunlight, easy to operate and convenient to apply; When charging, please turn on the bottom candle switch clockwise to . Light Sensor: built in light sensor, after absorbing light energy in the sun during the day, dust to dawn window candle light automatically light up when it is dark, and light up time is about 6-8 hours; Solar candles cannot light up during the day or in the bright area, they only light up in the dark when you turn on the switch. Long Service Life: these flicker flameless candles for outdoors not produce wax drops, and have no carbon emissions or harm to the air, do not consume energy with a long service life. Reliable to Use: no flame, no heat, waterproof solar candles can reduce the hidden problems caused by the burning of traditional candles, which can be applied around children and house pets without worrying about fire related accidents.