Warm Tips: 1) The charging effect of the solar panel depends on sunlight. Be sure to place the solar panel in a place exposed to direct sunlight. Make sure the solar panel is exposed to direct sunlight for at least six hours. The product can last between 8 and 12 hours in sunlight per full charge. 2) Make sure the switch is in the "ON" position for charging. Cover the solar panel with your hand and check if the light turns on automatically. When you receive the product, please turn on the switc