Local governments around Europe paid €7.6 billion to light public streets in 2015. But their bills could be cut down by up to 70% if local governments are willing to shell out extra funds to install new lighting. The European Commission is trying to help cities find funding—with the goal of setting up 10 million of the more expensive streetlamps around the EU by 2025. For now, there are only a handful of them in European cities. Lampposts with high-tech LED lightbulbs that connect t ...