1. The Solar Bulb Light is energy-saving, can be charged by infinite sunlight. The Solar panel can be fixed on the roof or any place with sufficient sunlight, the waterproof 3.5M wire can be introduced into a room, and the DC connector can be plugged in the port for easy charging. In daytime, when there is sunshine, the solar panel absorbs the sunlight automatically, converting into electricity and storing into the battery; illuminating in the night, scattering the darkness. 2. Firstly, the lamp must be on turn on condition, then insert the cable (connected with solar panel) into the lamp plug. Then after daytime charging, it can light up automatically when dark falls; the bulb can turn off automatically and become charged when daytime comes. 3. The bulb has a maximum brightness at 130LM, equivalent to a 3W energy saving lamp or 15W incandescent lamp; Full brightness for 4 hour at low power consumption. Sturdy DesignThe bulb is made of ABS plastic, durable and shockproof. The light cover is thickened PC, not easy to be broken 4. The built-in battery has the over-charge and over-discharge protection in its circuit. When it is fully charged, the circuit will stop charging automatically; when the battery continues to discharge until the voltage drops to 2.8V, the protection circuit will automatically cut off the power, to stop lighting, and protect the battery lifespan.