After seeing Walter de Maria I reminded of this project of Richard Box: "Field" The Guardian G2 26.02.04
"How does this field of lights work?
Ian SampleThe 1301 fluorescent tubes are powered only by the electric fields generated by overhead powerlines.
Richard Box, artist-in-residence at Bristol University’s physics department, got the idea for the installation after a chance conversation with a friend. ‘He was telling me he used to play with a fluorescent tube under the pylons by his house,’ says Box. ‘He said it lit up like a light sabre.’
Box decided to see if he could fill a field with tubes lit by powerlines. After a few weeks hunting for a site, he found a field, slipped the local farmer £200 and planted 3,600 square metres with tubes collected from hospitals."
(continue readingof just look)