Real Quick Research

Weather Project, Olafur Eliasson, 2003
His site: olafureliasson
His pictures/video:

What a badass: "I'm just gonna put a sun in a room." (Please note that this was, to my knowledge, never said by Eliasson).

Nimbus, Berndnaut Smilde, 2010-2013
Site: berndnaut
Pics/Video:

More weather! In a smaller room!

Caleb Charland
Site: calebcharland
Stuff:

That is a lamp powered by apples. 

And a lamp powered by potatoes.

And citrus.

I didn't know how one would go about making a food powered lamp. I must have skipped that lession in year seven, however I did attend the week we were supposed to memorise the first 20 elements of the periodic table for a test. Hydrogen, Helium, Lithium, Beryllium....So I looked it up and thanks to Physlink I kinda understand the theory behind it:

Essentially "zinc and the copper are the anode and cathode terminals of your potato batter. Using ordinary hook-up electrical wire, you can use the potato to create a voltaic cell, which will power a VERY small bulb. A light emitting diode (LED) will work fine.

Cut the potato in half. Wrap the end of a piece of wire around a galvanised nail and wrap the end of a second piece of wire around a penny. Stick the copper side into one piece of potato the nail into the other. The zino and copper electrodes should not touch each other. If a wire is connected between the zinc nail and the copper penny, electrons will flow. However, direct contact of the two electrodes will only produce heat."

And then it goes into the chemical reactions which makes it happen. Link: physlink
This guy is a gun when it comes to explaining this:


And these guys are british: