Circuit breakers used for switching fluorescent lighting circuits shall be marked _________.

Circuit breakers designed for switching fluorescent lighting circuits should be marked as SWD, which stands for Switch Duty. These breakers are specifically rated for the high inrush currents that fluorescent lights can draw when they are switched on, making them suitable for this application.

In addition, HID indicates High-Intensity Discharge, which includes some types of lighting that also experience high inrush currents similar to fluorescent lights. Therefore, circuit breakers marked as either HID or SWD could be appropriate for managing these specific lighting circuits, depending on the design and application of the lighting system. The inclusion of both options emphasizes the versatility of circuit breakers that can handle the requirements of fluorescent lighting effectively.