Efficient Work:It takes 6-8 hours for charging then it can work for 8 hours at night. Please turn on the ON button on bottom before charging by the sun or good daylight. The waterproof level is IP44, which is NOT suitable for storms and extreme weather Solar Panel:The diameter of this solar light replacement top is 8 cm on top and the bottom base diameter is 7.2 cm. Perfect fit for Solar lanterns and watering can lighting and Fairy lights on the market，Easy to replace, just replace the solar panel if you are done using it. Please kindly check the size compatibility of your solar lamp in advance Easy to Install and Use: The solar light replacement installation is very simple, just replace the old solar light replacement top. Put the new solar light replacement cover into the iron light hole, turn on the switch, it will automatically work at night or in a dark environment, and stop during the day Automatic: Simple on/off switch, automatic turn on at night and off during the day,free to switch status whenever you want.Avoid frequent manual opening and closing Safe to Use:The LED light bulb has only 1.2V low voltage, long life, energy saving, no heat, and anyone can use it with confidence; this waterproof solar light uses solar energy, which can reduce power consumption, save a lot of wires, and make your lantern look more charming