The Soil Lamp from designer Mareike Staps uses the natural conductive capacity of soil to light up an LED bulb. The lamp is quite simple, having a transparent body that lets you see all of its inner workings. Conductive plates buried in the soil react with water (which you have to add every now and then) to create enough clean, free energy to keep the light burning virtually forever.
soil powered lamp
Design house Hulger is tackling light bulbs as their next big object, using the twisting tubes as pieces of functional art that you won't want to hide behind a shade. The new bulbs, called Plumen, should be hitting the market soon, although the final designs have yet to be unveiled. But with the Plumens delivering both aesthetic quality and energy-saving tech, they look to be winners right out of the gate.
Looks like Japanese to me :)