Solar Bottle Bulb

andrewcheng | Living | 09/04/2011

Turn a simple 2 liter soda bottle into a 55 Watt light-bulb!

“A Liter of Light” is a program founded by Illac Diaz in the Philippines to bring light to poor communities. The technology, developed by students of the Massachusetts Institute of Technology, uses a chemical mixture to reflect the sun’s light within dark, enclosed areas.

Building this bottle bulb is simple:

1) Fill a 2-liter water bottle with purified water. Do not use tap water as moss will grow.
2) Add three teaspoons of liquid bleach.
3) Twist the bottle cap back on tightly.
4) Fix onto rooftop.