The light is powered by solar energy through solar panel. the solar panel converts sunlight into electric energy and then changes built-in AA?Ni-Cd rechargeable batteries during the day .A light sensor turns on the light automatically at night .The light can work up to 8 hours at night after a full sunny day charging .The light doesnt only light up and decorate your house and garden, but also saves electrics energy. Remark: the life time of LED lamp is over 100000 hours; you never need to change it. LED QTY: 4pcs VOLTAGE:1.2V/0.197W QTY (pcs):12 G.W. (kg):9.5 N.W. (kg):7.5 CTN (cm):54*36*29 Color: R/G/B/Y/W Stainless steel body MODEL NO.: SG-201 *Powered by polycrystal solar panel; * Patent awarded; *Aluminium construction; *Light Source: 1super bright LED; *Up to 8 hours of light at night; *colorful body; *Mirror polish or sand finish surface; *Quality Approval: CE; *Waterproof feature; *Lifetime: over 3 years; *Ground stake.