Cylinder :aluminum alloy Plating :anodizing Solar panel :monocrystalline Battery :nickel hydrogen crystal bulb :10 super bright LED bulbs , Size :5.75*24cm Luminous :17LX Operate tep :-40°C+60°C, Effect distance :50m Visiable light :2km Exposed in sunlight for 6 hours , its electricity will last 8 hours . Life time :100,000hours