Sometimes we need to remember to go back to basics to see how we can use light and new technological developments.  

The fantastic Gravity Light works on a similar principle to the clockwork radio and in the same way microchips made this possible, so the advances in LEDs has made the Gravity Light possible.

The driving power that generates the electricity is the energy exerted in lifting the weight onto the hook; from there on in gravity does the rest.  

It's basic physics applied in a very clever way.    This wonderful, genuinely innovative, product is literally transforming lives!     We wish the developers and their trialists every success.