Umbrella Lights The Way

"LightDrops looks like an ordinary umbrella but don’t let that fool ya. There’s more than meets the eye here. 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. The heavier the rain, the brighter the light to help you see your way." Found here on Yanko Design.