Look at the ingenuity that went into providing light in these homes in the Philippines. Many of the people cannot afford electricity, but this helps them light their homes at no cost.
The bottles used in the skylights would otherwise just collect in landfills and water supplies. In addition to utilizing garbage for these lights, they also have another great feature in that they do not create heat and they have zero power consumption. It is interesting what people figure out when the need arises and the will to help is present.
