The necessity of saving energy is self-evident in daily life. However, this idea is a novelty regarding roads: tens of thousands of kilometers are illuminated continuously at night, even if there is no traffic at all. But convenience and safety do not demand permanent lighting, rather a dynamic and precise solution. The goal must be to create lighting conditions without unnecessarily brightening the environment, without unnecessarily disturbing the animal world, without wasting an unnecessarily large amount of energy. Light only when it is needed and where it is needed.