Solar powered lighting is nothing new these days but if you are looking for another interesting design, the Solala solar-powered LED lighting should be worth checking out. The lighting system features solar panels and an AA Ni-MH built-in battery which are behind the glow of the said lamp.
Apparently, charging is made during the day when the sun is up, something which would require about 6 hours of exposure to direct sunlight. As far as usage is concerned, the lamp is likewise good for use for up to 6 hours as well, something you can probably use indoors or outdoors.
The battery packed into the Solala can be charged 600 times and the lighting installation can also be juiced with AA batteries if required.