What is the name of an item placed on set, usually part of the set such as a clock or a lamp?

The appropriate term for an item placed on a set that contributes to the overall environment of a scene, like a clock or a lamp, is set dressing. Set dressing involves any decorative items that enhance the visual storytelling of the production, helping to create a believable context for the characters and action. These items are typically not handled by actors but are crucial for setting the mood and atmosphere of the production.

While the term "set prop" might seem applicable since both refer to items on stage, "props" generally refer to objects that actors interact with during a performance. Understanding this distinction helps clarify why "set dressing" is the more accurate choice in this context. A ground plan refers to a technical drawing of the set layout, and "key" usually refers to lighting or an important thematic element rather than physical items on the set.