The document discusses the role and responsibilities of the lighting designer. It begins by outlining the design process, which includes reading the script, meeting with the director, deciding on style, researching, and coordinating with other designers. It then discusses how lighting can be used to create mood, atmosphere, focus, and the appearance of different locales in a production using a single set. The rest of the document details the lighting designer's responsibilities in creating a lighting plot and cue sheets, the goals of visibility and focus/atmosphere, common lighting instruments, and examples of using gobos to enhance mood and texture.