Tvilight: The 'talking' streetlamps that will lighten your heart (but not your wallet)
Shah found that Europe pays over €10 billion ($13 billion) a year powering streetlights, which accounts for more than 40% of government energy bills.
I thought, why should each citizen pay for street lights that aren't being used? We now have a solution for that.
This translates into 40 million tons of CO2 emissions annually -- enough to power 20 million cars. His solution was to create an intelligent, "on-demand" lighting system using wireless sensors. Streetlights only light up in the presence of a person, bicycle or car, and remain dim the rest of the time.
By Daisy Carrington
First published on July 29, 2013