Matt Berg, of BuildAfrica.org, put together a photo montage (PDF) on the increasing use of super-cheap Chinese LED lighting in Mali, in West Africa. The middle picture is of a street-corner cell phone charging station. It costs about .25 to get your phone charged.
That last picture is basically of a motorbike filling station (with the fuel inside of recycled bottles). The little 36-lamp LED light on the left is the station’s nighttime lighting. The light costs around US$4.75 and can be powered for a week to a month of 4 D-cell batteries.