See waka-waka.com.
Waka-waka is Swahili for Shine Bright.
It is a solar powered light and charger for mobile phones,giving 150 hrs light on a charge of one day sunlight.
It can also be charged from the wall socket.
It easily fits on a Coke bottle filled with water so as to serve as reading lamp.
In this world over a billion people still live in the dark at night because there is no electricity.
Note this is in countries where there is plenty of sunshine.
When buying one,you automatically donate another one to a project of your choice.
This way,thousends have been distributed to schools and refugee camps in the third world.
I have one and must say the light is very bright for reading etc.
You could even light up a small room,just on solar power!
Would suggest to order the adaptorset also,so that all kinds of mobile phones can be charged.
Very handy for biking,hiking,etc.