This rechargeable/wind-up Freeplay Indigo lantern is a marvelous example of simple and effective design.
The Indigo is small, lightweight, powerful and best of all it can be totally human-powered. It is user friendly, with a well placed dial and button, a crank arm that is easy to use and intuitive (and folds away easily), and a powerful light for its size (through more efficient LEDs).
Its grand on a camping trip, but no matter the torches/flashlights you may have in your house this is also a great emergency lighting solution. Run out of charge and crank up the light. Brilliant. The Consumer Electronics Show thinks likewise.
Here's the site for more details. Buy one, or two.