Entrepreneur builds solar bottle lights to help his impoverished community

In case you're interested, some discussion from one of the previous times this story was submitted:

http://news.ycombinator.com/item?id=2842632

I say "one of" because there are others, although they didn't get any discussion:

http://news.ycombinator.com/item?id=2994086

http://news.ycombinator.com/item?id=2816556

I'm pretty sure there were more, but as promised, I've turned off all my automated duplicate detection, and I'm not going to spend the time searching.