The sun and a simple bottle bringing light
It is just as simple as it sounds. Using a simple 1.5 liter plastic bottle, fill it with water and add a bit of a chlorine solution (to prevent the water to turn green, because of the algae). Cut a hole into the roof where light is needed and place the bottle half way through it, use a sealant to make the hole water proof and that’s it. We , the www.raintree-foundation.org, found that idea watching a clip on the web, and implemented it in one of our community development projects. It is in our food storage room up in the mountains in Mae Hae where we have a children home. It will bring natural sunlight without common power sources into the dark room which have no window and usually needed an electric light. But with the environmental friendly bottle technique we have the same effect without the need of electricity and it improves the life quality of the children and the community.
Raintree-Foundation 