Which term is used when a new lighting state is achieved instantly?

The term used when a new lighting state is achieved instantly is "snap to." This is particularly relevant in theatrical lighting design, where transitions in lighting must sometimes occur abruptly to create specific effects or to highlight a moment in the performance. A "snap to" change is often employed to draw the audience's attention or to signify a sharp contrast in mood or setting.

In contrast, a slow fade refers to a gradual transition from one lighting state to another, which can create a softer mood and is often used for smooth scene changes. A fast fade, while quicker than a slow fade, still involves a transition that takes some time, albeit shorter. Promenade, on the other hand, refers to a style of performance where the audience moves around a space to view the action from different angles, rather than a lighting technique. Hence, "snap to" is the appropriate term for an instant change in lighting.