The LightDrops LED umbrella, designed by Sang-Kyun Park, is powered by the energy of falling rain drops. The heavier the rain, the brighter the light to help you see your way.
If you must know - as water pours over the surface, potential energy from raindrops slamming onto the conductive membrane called PDVF transforms into electrical energy powering embedded LEDs sending your umbrella ablaze with light. Happy?
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