This lamp runs on water and salt. And it can bring a lot of light to the rural communities of the Philippines, often not connected to the power grid. (This is not so strange by the way, knowing that the country is spread over more than 7000 islands.) Lipa Aisa Mijeno, an entrepreneur from the Philippines, invented this lighting alternative for the current solutions: candles, paraffin, or battery-operated lamps in their homes, which have been known to be expensive, and cause unhealthy or dangerous situations like fires. The lamp uses the salt water as the electrolyte in a galvanic cell battery.
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