The Energy and Resources Institute, or T.E.R.I., along with others, has been working on a model to increase the use of solar lanterns in rural India. Though these devices are incredibly simple to understand – a solar panel charges them during the day so they can be used at night – they are still too expensive for many. (Basic lanterns cost as little $5, but hardy and more useful models can cost as much as $80.)

I need to get this for my family members who live in the rural areas of India!