I'll admit that I got the inspiration for this project straight from C. S. Lewis's The Chronicles of Narnia.
My guitar teacher gave me his old lamp post when we stopped by his house one day as he was digging it up to put in a new one. He was like "Do you have a use for that?" I knew exactly what to do with it... It became a summer project of ours running wiring up into the woods since we had to dig a trench to do it, but the results were nothing short of absolutely magical!