Wind as a light source or sound source

Although my idea of harnessing the wind is still my main concern, I am still at a standpoint whether I should harness the energy to develop light or sound. I found some interesting links which have provided insightful inspiration and possibly direction, but my concern regarding who this design applies to continues to pester inside. The aspect of integrating some realism to this project in regards to use maintains to be a question.
This link I found caught my attention because of the simplicity of generating energy on a small scale. Each LED is indepently lit , but as a whole, the system has the potential for lighting.