Every problem has a solution. Sometimes you find them in the most unlikely way.
Illac Diaz, created a way for poor people, living in windowless, closely built homes in slum areas to light up their homes with plastic bottles.
The plastic bottles are filled up with water with bleach added to prevent any formation of bacteria. The idea is that water inside the bottle refracts the sunlight during the daytime and creates the same intensity of light as that given out by a 55 watt light bulb.
Light from a bottle of water? Check out to see if it really works.
If you are interested to make yourself one, watch this video.
You can also find the free tutorials at instructables.com.
Share this idea if you think it could help your community.