PSFK takes a look at two efficient designs.

LED bulbs have been gaining popularity in recent times, with many companies and research labs coming up with new breakthroughs in the design and form of the energy-saving product.

Hong Kong-based Nokero has developed a solar powered LED bulb (above) which draws all its power from small solar panels mounted on its sides. The N100 bulb is housed inside a rainproof case with a battery that can light the bulb for up to four hours. Nokero plans to introduce this bulb to under-developed regions and would price it at around $6.

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