["Wider Den Nächtlichen Unfug"-Bielefeld's Street Lighting from 1853 to the 1880s as a Securatization Infrastructure and Tool for Self-Discipline].

This article deals with the change in safety requirements and technological possibilities in the course of industrialization by looking at the establishment of street lighting in Bielefeld in the 19th century. As will be shown, the development from oil to gas lanterns coincided with a change in the security needs of the urban middle class. It was the technical possibilities of gas lighting to penetrate the urban space at night that made marginalized groups of people who were perceived as a security risk visible.