Suzuki has done a neat job of creating a lemon-half that contains the light and metals to utilise this eco friendly technology. I'd be interested to know how it was made, as it's not obvious from the picture on how it was done!
Source: Make: Blog
Dan is a well-experienced author who is interested in exploring new things related to eco-friendly gadgets and technologies. He never lets any latest technology go off his sight. Being passionate about contributing to the clean environment, he writes articles on the latest renewable gadgets and other energy-saving technologies.