The brainchild of designer Sang-Kyun Park, LightDrops is an umbrella that uses the piezoelectric effect of polyvinylidene fluoride (PVDF) to transform falling rain into electricity, which is then used to light LEDs installed on the umbrella's underside. The heavier the rain falls (and the harder it hits the umbrella), the brighter the light shines. Combine it with the solar tie, and who knows? This might someday become de rigueur for the stylish tech professional. Ella, ella, ella[Via
