What term refers to when the whole acting area is evenly lit?

The term that refers to when the whole acting area is evenly lit is "wash." A wash involves using a broad beam of light to illuminate a large area on stage uniformly, creating a soft, even light that allows actors and set elements to be seen clearly without harsh shadows. This technique is essential in theatre because it sets the overall mood of a scene and ensures visibility for the audience throughout the performance.

In contrast, spotlight generally refers to a more focused beam of light used to highlight a specific area or actor, creating emphasis rather than an even distribution. Highlight refers to a specific brightened area within a set or performance that draws attention, often created by directional lighting rather than a wash. Floodlight, while it can light large areas, typically refers to a type of light fixture rather than the technique of lighting an entire area evenly.