Product parameters:Product Name: Solar Buried lightsSolar panel: 5V / 200mAh polycrystalline silicon solar panelSolar battery: 1 * 1200mAh 18650 lithium batteryLamp beads: 17 * 2835SMDColor temperature: 2000-2500K warm lightLumens: 30 lumensCharging time: about 10 hoursWorking time: about 50 hoursMaterial: ABS + PCProduct size: 120 * 120 * 135mmThe package contains:8 * Solar Buried lights1 * Screw package1 * Ground plug accessoriesNote:1.Make sure to turn on the switch before use.2.Make sure expose it to the sunshine for about 10 hours to fully charge before using it. (lack of sunny or cloudy weather will lead to insufficient charge and shortens use time).3.Please put the panel under direct sunshine, adjust the light angle to illuminate the perfect spot and adjust the solar panel angle for optimum sun exposure. 4.Please wiping it regularly with a damp cloth. A dirty panel will reduce the amount of sunlight available to charge.