Height between light source and ground: 2.5mSolar battery: monocrystalline or polycrystalline solar battery components with high conversion efficiency Light source: 5-13W low-voltage direct current tricolor energy-saving lamps special for solar energy, 5-12W super-highly bight LED.Illumination hours: 3-8hContinuous rainy days: 3-6 daysController: adopts microcomputer chips, integrated sensor, and noncontact control technique,with functions as temperature compensation, intelligent discharging, etc.Storage battery: free-maintenance full-sealed Valve-Regulated Lead Acid BatteryApplicable range: areas with more than 2200 hours of annual sunshine time.