Yet, there are many simple and proven smart city solutions that are sustainable. Let’s look at a case that covers more than 20% of the smart city market worldwide: smart lighting. Light is an incredibly important factor in our lives, that we can influence. Smart lighting can help improve traffic flows, reduce crime, increase sales, replace fireworks, etc. But light pollution has become a serious issue. Light accounts for about 20% of the power consumption worldwide, and our earth is a wandering, illuminated sphere at night. A street lamp uses 90% of the energy as heat: what a waste of our resources. The lighting infrastructure is relatively old in Germany, often dating back to the 1970s. It’s time to tackle this issue. This case is ecologically and commercially attractive: in most situations, we see savings and returns on day one. You could just replace the bulb with an LED, like we do at home. But a street pole can also be a strategic location for a city to improve connectivity, charge electric bikes, measure the noise or air quality, provide room to mount pole-cams, etc.