Solar powered LED light for sign 1. This solar powered LED light for surveillance sign is charged by sunlight at daytime and work at darkness/night. 2. IP-66 waterproof could run well even in rainy weather, suitable for most environment such as yard sign, exterior wall, fence, outdoor stairs, garden, deck and etc. 3. 6-8 hours solar charging time lets the LED solar light illuminating about 12 hours. 4. Easy installation: Directly clip the knob on surveillance sign; Remove the side knob and secure onto flat surface(wall/wood)S with supplied screws. "ON" position: the-built in sensor will be on, the light will turn on when it is getting dark. "OFF" position: the-built in sensor will be off, the light will be completely off. Battery will be charged when the product is exposed to sunlight, no matter the switch is ON/OFF. Kindly note: Please make sure the solar panel expose to sufficient sunlight of minimum 4-6 hours to charge. Longer sunlight hours will provide brighter light and longer working hours. Do not install solar powered light near other lights, it will interfere with sensor operation.