Solar energy: This solar light bulb can collect solar energy through solar panels. When there is sunshine during the day. Connect the solar panel to the light bulb via a USB cable. The solar panel converts solar energy into electricity, which is stored in the bulb's batteries. Then when you turn on the bulb, it stays on. Two-Way Charging: The bulb can be charged via a solar panel or a DC 5V adapter via a USB cable. It can keep lighting for 4-6 hours after fully charged. LED life is 50000 hours. When charging the solar panel: Please put the solar panel in the outdoor sunlight, and keep the solar panel facing the sun. At the same time, connect the bulb to the bulb with a wire for 5-8 hours. The charging indicator light is red when charging. It is still red when fully charged. (5-8V power adapter can also be charged). Application in Many Situations: Great for home, camping. cooking. Serving. read. shed. chicken coop. Emergencies and power outages etc. Polite words: The bulb is not waterproof. Solar panels are rainproof. Easy to install: Fix the solar panel outside in a sunny place. And lead the cables into the room to connect the solar panel to the light bulb. Portable: with rechargeable battery. The light bulb can be used as a moving light. It is energy efficient. It is a good helper for climbing. travel. and expedition.