In the South Korean Seoul green project, the constructors have introduced a section of light stone in the natural landscape, named moon stone (Spanish: LunaPiedra). This kind of stone interior has inserted the light emitter diode, may provide the illumination at night, they will substitute for the lighting which uncoordinated attachment natural landscape. These light stone does not need the energy support when in use. They can borrow the energy from river when they in running water, the internal generating set transforms the fluent kinetic energy as the electrical energy and uses the environmental protection.