Solar street lights by Jongoh Lee

Invisible Streetlight emits light at nighttime by saving energy from sunlight during the day. The most innovative element of Invisible Streetlight is that it does not require a support because the flexible body in the shape of tree branch is directly installed to the trees lining a street. Installation is simple in parks and outskirts of urban centers. Also, Invisible Streetlight does not spoil scenic beauty of the surrounding areas.

http://www.coroflot.com/public/individual_set.asp?individual_id=143918&set_id=160508&

This concept fulfills two great objectives, streets lined with trees and solar powered street lights.