Solar bottle lamps
These solar bottle lamps are bringing affordable lighting to impoverished communities
A 1.5 L bottle is attached to s small solar panel that can power an LED for 10 hours
The bottle is filled with water and a tiny amount of bleach to prevent algae formation
The water's refractive properties magnify the LED's light
The light provides as much lighting as a 55 W incandescent light bulb
Liter of light provides instructional videos on bottle lamps of your own