What are the lights called that are turned on to clean and prepare a theatre venue?

The lights that are turned on to clean and prepare a theatre venue are commonly known as "cleaners." These lights provide illumination that allows stagehands, crew members, and other personnel to safely navigate and prepare the space for performances. Cleaners are typically brighter and are designed to flood the stage with light, enabling the team to see the area clearly as they set up for a show, perform maintenance or repairs, and assure that everything is in order before the audience arrives.

The other choices refer to different types of lighting with distinct purposes. Stage lights are used to illuminate the performers and set during a production, often featuring different colors and focuses that enhance the artistic presentation of the performance. Exit lights are part of the safety regulations in theaters to indicate emergency exits, ensuring that audiences can find a safe way out in case of an emergency. Safety lights serve a similar purpose in guiding people safely through the venue, typically illuminating pathways or exits. In contrast, the primary function of cleaners is utility during the preparation and upkeep phases of the venue.