In the eyes of many, railroad underpasses are dark, eerie places, or even social trouble spots. The Hamburg-based “Lebendige Stadt” Foundation makes railroad tunnels less threatening by brightening them up in an artistic way. The organization provides a handbook on how to implement the illumination and funding, promoting light installations that make underpasses safe and passers-by feel secure. The new illumination is also a boon due to its energy efficiency. Municipal authorities save on electricity and the light installations make city districts more attractive.