What specific type of exterior lighting is controlled by the roof-mounted photo-cell shown above Panelboard CC?

The correct answer indicates that the type of exterior lighting controlled by the roof-mounted photo-cell is pole-mounted outside lights. This is because photo-cells are typically designed to manage lighting systems that automatically turn on or off based on ambient light levels. Pole-mounted lights, which are often used for general area illumination, security, or to light driveways and parking lots, frequently rely on such sensors to optimize energy usage and provide consistent lighting during the night while remaining off during the day.

The choice of pole-mounted outside lights also aligns with the typical applications for roof-mounted photo-cells, which are placed in a position to effectively sense daylight and control lighting across a broader area, making them ideal for taller installations such as poles. This placement leverages the sensor's ability to receive unobstructed light readings.

Other types of lighting, like wall-mounted lights or sconces, may not benefit as significantly from a roof-mounted photo-cell due to their positioning and intended use. Flood lights can also be controlled by similar devices, but they often require direct control according to specific illumination needs rather than relying solely on ambient light conditions. Hence, recognizing the best application for the photo-cell's capabilities in managing outdoor lighting leads to selecting pole-mounted outside lights as the most suitable choice.