A simple yet elegant lighting system used for when camping and you are short on propane lanterns. I also have an inverter and a speaker system hooked up, for camping "necessities".
All is powered off a deep cycle 12 volt battery I got cheap at Costco.
The battery lasted almost the entire 3 night camping trip, pretty impressive considering we ran the speaker all day long, and the lights burned into the wee hours.
Step 1: Run taught support wire between trees
I happened to have a decent sized spool of steel wire laying around, so I cut it in half, then tied 2 ends to a length of twine and wrapped it around one tree. I then took the remaining 2 ends of the wire and wrapped them around some nails I had implanted into a tree on the other side of the campsite. I tied them around a couple pieces of firewood to provide tension on the lines. I wrapped one of the nails in a couple layers of electrical tape to prevent voltage leaking into the tree.