Which types of lights are recommended for use at night?

The correct choice emphasizes the importance of using lights that are specifically designed to enhance visibility and safety during nighttime flagging operations. Type A lights are commonly used for warning signals and are designed to be highly visible in low-light conditions. Type C lights typically offer a higher intensity and are intended to illuminate the flagging area effectively, ensuring that drivers can see both the flagger and any warnings clearly.

Using a combination of Type A and Type C lights provides a multifaceted approach to nighttime safety, as each type serves unique functions to alert and direct traffic. This combination ensures that the flagger can be seen from a distance, which is crucial for maintaining safety in dark or poorly lit environments. By utilizing these two types of lights, flaggers can significantly reduce the risk of accidents, ensuring both their safety and that of the motorists they are guiding.