LED street lights that brighten and dim with the time of day reduce carbon emissions and save money.
This article titled “Smart street-lighting provides roundabout solution” was written by Steven Morris, for The Guardian on Wednesday 20th July 2011 16.59 UTC
A council in south-west England has installed what it claims to be the first smart street-lighting system on a busy roundabout.
More than 70 LED lights have been installed at the junction between Bath and Bristol. Their brightness automatically adjusts depending on how dark it is but also takes into account the number of vehicles on the road at any given time.