Chemical Halo
"By night, the Eco Halos hover in suspended animation above the busy junctions. Colour changes occur imperceptibly in response to environmental conditions or as programmed by artists. [...]
"The Halos will be solar powered and use a mix of low energy red, blue and green LEDs within a polycarbonate diffuser to create a spectrum of soft glowing colours which will be clearly visible in the daytime. The combination of directional LEDs and a directional diffuser controls night sky light pollution and unwanted light spillage."
More: www.richardwilding.co.uk
nice. when are we all getting some? wonderful. does it really control light pollution? does that mean we'll see a couple more stars in the urban sky above?
It's kind of odd to read your journal and see a photograph of my street! How'd you hear about it? I'll take some photos when they've got it up and running.