The exhibition ‘A Light in the Night’ gives darkroom visitors a sensory impression of what miners could see with the help of their lamps. It traces the function and development of mining lamps in the 20^th century using historical mining lamps, showing the work of the lamp master and his employees in a reconstructed workshop. They ensured that the lamps were charged, maintained or repaired and functioned properly. The exhibition also illustrates that the lamp was not just a work tool but also became a cult object, providing insight into the 20^th century cultural history of the miner's lamp and displaying numerous examples from art and everyday culture.