In lighting terminology, what does Douser refer to?

Douser refers to a device used in lighting design that blocks or dims the intensity of a light beam. It is commonly used in theatrical lighting to control the illumination levels and create various effects on stage. By manipulating the light output, a douser can enhance the visual storytelling of a production, allowing designers to manipulate focus and mood effectively.

The other options do not accurately represent what a douser is. While cues given to actors are vital in directing performances, they are not related to the technical aspects of lighting. A method for controlling temperature is not relevant to lighting terminology. Additionally, a lighting fixture is a broader category that includes many types of equipment, while a douser is specifically a tool for controlling light output.