This sweet battery lamp is like the 9Vo(l)tive lights that we found a while back, but better. Better in that this looks like a mini lamp, complete with pull chain, which is sweet, and also better because this one is actually available for sale online.
Simply grab a 9 volt battery, plug the battery lamp in, and voila: a little stand alone light. Sure, it's small, but if you get a bunch of them they'll provide enough light for you and will act as conversation pieces as well. The only problem is the price: $35 for a small LED light is pretty steep, but then again I'd like to see you build one of these yourself.