With enough sunshine, the solar lights are fully charged within 4-6 hours. It will light up for 6-10 hours when fully charged. Automatic sensor: like all outdoor solar lamps, the lamp has a sensor that turns on the LEDs in enough darkness, if you leave the switch on in ON mode. In daylight, the lamp does not turn on. Easy to use: each light has an on/off switch under the lid. Slide the switch into the "ON" position before charging by solar These solar lights turn on/off automatically. Glow in the dark. Turn off during the day. Perfect for any occasion Very popular solar lanterns made of mason jars create a warm and charming atmosphere in your garden, patio, lawn, Christmas party, wedding, reception, formal events and BBQ, pathways and ponds. Waterproof design: with the updated stainless steel lid and the O-shaped silicone sealing ring, it prevents rainwater from entering the glass. So you can use it outdoors in the rain.