Attention: A.Keep solar panel clean so that charge quickly.B.10 a.m to 2 p.m is the best time of charging for solar. C.The Light is waterproof but not prevent water-soak, avoid installed in the place of waterlogged easily. D.Be careful when installing them, you need to pound the stake into the ground then attach the light. Do not put too much pressure on the light itself. If the ground is too hard, do not twist or hammer it with force. Try to soften the ground with water and then insert into the ground. Main Features Easy Installation You can stick the light into the lawn with included spikes or hang it on the tree and the solar panel also can be inserted in the ground or mounted on the wall, tool-free and convenient to use.