This was an interesting idea!When you think about it, you need a lightbulb when its dark outside. So why would you have a solar powered light bulb? You need some kind of light source to run the bulb.... In places in the world were they have no energy to every house, they need so kind of light source. They can use thing such as fire but they are very dangerous and cannot be used well indoor. So the solution to the light bulb problem, you need some kind of storage. The problem with standard batteries is that they do not hold their power well. These batteries in the device, have a 2 year life span. This is very well for a battery. Most importantly unlike candles and other fire sourced lighting, batteries are fairly cheap to replace. Especially if they have a two year life span. Also note, the shape of the device is that of a light bulb! I thought that was cool.
http://techcrunch.com/2011/09/16/nokero-solar-power-bulb
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