A "light bulb" now exists that does not use any conventional energy.
Introducing the Solar Bottle Bulb -- an alternative source of daylight powered by the sun. It is made from an old soda bottle. By filling it with water and sealing it into the roof, the water refracts the sun's rays and provides about 55 watts of light to a darkened room.
This video take us to The Philipines. The villagers are saving money on electric bills, and literally seeing a big difference in their lives.
It can be built and installed in less than 1 hour, and uses inexpensive or recycled materials. The water is mixed with some bleach and does not need replacing for about 2 years.
There is no shortage of green jobs for those installing the miracle light bulbs either. The installer in this video had to quit his day job to keep up with the demand!