If that day comes when all the power is gone, candles won't be the only way to light your path. Here's an example, Time Your Light, a design concept by Jasper Hou that gets its power mechanically, working just like a windup doll.
Just give it a twist, and your world is illuminated. We can only hope there's not a constant ticking noise going along with the lighting effect. So is this a timer with a light attached, or a mechanical light that works like a timer?
It's not entirely clear. We suggest both, making this a multipurpose gadget, adding a "ding" at the end of the timer's countdown. Check out the pretty colors:
Via Yanko Design