Which plan type is specifically designed to show lighting layouts?

The plan type specifically designed to show lighting layouts is the reflected ceiling plan (RCP). An RCP provides a view of the ceiling as it would appear from below, including the locations of lighting fixtures, HVAC systems, and other ceiling elements.

This type of plan allows designers and contractors to visualize how the lighting will be arranged within a space, which is crucial for both aesthetic and functional purposes. It helps in ensuring that lighting is evenly distributed and adequately illuminates the intended areas while allowing easy access for maintenance and installation.

Other plan types serve different functions. For instance, mechanical plans focus on the mechanical systems of a building, such as heating, ventilation, and air conditioning (HVAC). Electrical plans show the broader electrical systems but are not limited to lighting alone. Architectural plans detail the structure and layout of a building, including walls, doors, and windows, whereas the RCP specifically targets the ceiling and its components.