How Do These Solar Tea Lights Work? Simply switch on bottom "ON" button and always keep ON status, these tealights will turn on at night, and get charged in daylight automatically.Absorb sunlight solar power on daylight, automatically transfer to electricity. NOTE: Please always keep the bottom switch on " ON" status even in daytime. It's getting charged on daytime, it will light automatically at night. Turn off under sunlight, and Charge Automatically. Turn On Automatically under Dark/at Night IP65 Waterproof Solar Tea Lights Wide Applications Solar candles are perfect for wedding, holiday, window, lanterns, pathway, garden, fence, patio, yard, camping, home, indoor, outdoor, chandelier, tabletop, Mason jars, windowsills, Christmas Holiday decors. Note: The solar candles only light up in dark places.