The working principle of Solar LED Hourglass Post Top Light: The solar panel is irradiated by sunlight, absorbs the sun light and converts it into electric energy to charge the battery. At night, the battery pack provides power to supply the LEDlighting to realize the illumination.The DC controller can ensure that the battery pack is not damaged due to overcharging or overdischarging,meanwhile, it has temperature compensationand lightning protection, reverse polarity protection and other functions such as Light control, lighting 3-5 rainy days.Ideal for park,villa residence,Lawns,Courtyards,Roadways and many other applications.