Final answer:
A dimming LED lighting control system is most suitable for a car dealership to meet LEED requirements while leaving lights on after business hours, offering a balance between security and energy efficiency.
Step-by-step explanation:
When designing a new car dealership to meet LEED requirements, selecting the appropriate LED lighting control system is essential for energy efficiency and sustainability. While an on/off switched system is the most basic, it does not provide any energy savings after hours when the parking lot is empty. An occupancy sensor could be considered but may not be the most efficient if the goal is to leave lights on for security reasons. A photocell ensures lights are only on when natural light is insufficient, which is not ideal for all-night illumination. Therefore, the most appropriate LED lighting control system for a dealership where the owner wishes to leave all parking lot luminaires on after business hours is a dimming system. This allows for reduced energy consumption while maintaining some level of lighting for security and visibility after hours.