Tomato Power  

Inhabitat has a post on tomato powered illumination - Table Lamp Powered Completely by Tomatoes!.

We all know tomatoes pack a powerful acidic punch, but we never thought we’d see one lighting up a room! Cygalle Shapiro of Israel-based d-VISION has created an incredible LED lamp that is completely powered by real, edible tomatoes. Currently exhibited at the Milan Furniture Fair, the design collects energy from a chemical reaction between tomato acids, zinc, and copper. This design doesn’t only explore advances in lighting technology – its also an art piece that sends clear and powerful social-conscience messages about where and how we receive energy.

d-VISION’s tomato lamp calls attention to the amount of natural resources needed to produce even the smallest amount of power for everyday living. Although the tomato lamp utilizes an organic energy source, it still takes a considerately large amount of tomatoes just to power one lamp. The lamp holds power until the tomatoes go stale, signaling a beginning and end to energy sources. The designer highlights value by creating the tomato-powered circuits and lamp completely out of gold.