Walking alone at night is dangerous, especially rainy night. People can hardly notice you at night, some more if you are wearing dark-colored-shirt and a black umbrella..
Isn't it creepy? We need to lighten up ourselves, in case of being bang by stupid drivers. So, you need an umbrella for the rain, and torchlight for the light. That's not a practical way to lighten yourselves. Now, we have a solution , the Lightdrops Umbrella , an umbrella designed by Sang-Kyun Park !
This is an ordinary looking umbrella which carries an intelligent membrane converting the energy from falling raindrops to the LED light, the heavier the rain is, the brighter the LED shines...Very smart invention !