I saw a very interesting project today on solar lanterns charging. An entrepreneur is supported to set up a solar charging station and lantern users are charged a certain amount of money every time they bring the lanterns for charging. The entrepreneur also maintains the lanterns and follow up with users to make sure that they charge their lights as required and do not abuse them. The technology is well researched and tested in different places.
This could be a very simple way to reach many people with better lighting, promoting entrepreneurship, income generation, cost saving and many more.