Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for
an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for
a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:

(free of charge)

Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

Rollight / water carrier and lamp


Rollight designed for developing countries can be used to collect and carry water in the daytime and generate electricity for illumination during nighttime.

The poor people have to walk a long distance to collect water as daily routine. But, it seems uneconomical to spend their limited energy on one thing—walking to collect water. They need not only water but also light for their live.

Rollight tries to solve the problems. The rollable water container can facilitate water carrying. The lamps set in the center of the container with electromagnetic generators, which can convert kinetic energy to electrical energy for light.


National Chiao Tung University

National Chiao Tung University
Hsinchu, Taiwan


LCC Design

LCC Design
Pingtung, Taiwan