We recommend you use MODE 3 (Sensor light mode). The light is off when there is no movement, full brightness when motion is detected. It will be more energy-saving and environmentally friendly, the life of the lights can be extended by about 50%. MODE 1 (Constant light mode) : auto power on at night, auto power off during the day. MODE 2 (Dim light sensor mode): Dim light when there is no movement, full brightness when motion is detected. 🌞【1 Pack Solar Fence Lights 】The Solar panel convert solar energy into electricity through daily exposure to sunlight. Equipped with a 1200mAh large-capacity rechargeable battery, brightness is up to 800 lum, it can illuminate your house more than 8 hours working time at dark night.