The photovoltaic panel is fixed in the roof or a place with sufficient sunlight, the wire is introduced into a room, and the plug is plugged in the port for charging (This solar shed light can be charged by 5-8V charger as well). Energy saving and environment-friendly outdoor solar camping lights. High performance, strong practicability, durable. With a hook which is removable, easy to hang on and long lifespan outdoor camping light. The light on the top of the bulb will always be red if it is in charging condition. Only when the line is not connected or switch to OFF, the light will be turn off. Pay Attention please:If the bulb you received is not light,don't worry,put it on the strong sunlight of outside about several hours,the bulb will be light! But if it doesn't work,It because the bulb was no electricity,you can charge it direct by Android line with the USB for a night.Then the lights will be work as normal. And if you have any questions about the useage of the bulb,pls feel free to cantact us,Thanks!