For best results with solar lighting place solar panel in direct sunlight, Switch to ON during the first day, switch to OFF for the first night so that the light does not operate, Repeat for another full day & night to give the batteries time to charge fully, On the third day switch to ON & your light will now charge in the day & light up at night, If you find your solar lights are failing, the battery may have lost its charge, repeat this exercise to help them recharge