LITERS OF LIGHT: IN THE DARKNESS

Project A Liter of Light promises by 2012. provide one million poorest households the Philippines at least the minimum required coverage - though completely free. In a country with an incredible level of poverty has a lot of people in their homes ( if you can call as collected from the trash hovel in which they live ), electricity, and those lucky ones that have often suffered from fires due to short circuits in the old and ... A typical family housing such accidents is close to the neighbors, and covered with a roof made ​​of thin sheet metal - easy and cheap. Small windows do not allow enough light, and simple hole in the roof let in only a narrow beam, and at the same time - and the flow of water during rainstorms. But the authors of the project Liter of Light found a surprisingly elegant and cheap solution. In the metal roof makes a hole into which fits snugly into conventional plastic bottle, and poured water into it with a small amount of any bleach. The upper part of the bottle picks up falling on her sun, and filled with a mixture of lower diffuser is very effective: according to the authors, each a bottle replaces the standard 60- watt incandescent bulb. And unlike the lamp, this light source will last for five years without any wires.