For objects more than 150 feet, what lighting identifies the object at night?

• A. High-intensity flashing white lights
• B. Steady burning lights only
• C. One rotating beacon
• D. A combination of one or more beacons and one or more levels of steady burning lights

Answer: (D)

When tall structures are present, night identification relies on a lighting setup that both marks the top and reveals the height along the structure. The best choice combines one or more beacons with one or more levels of steady-burning lights. The beacon provides a distinct, flashing signal that signals the top or overall presence, while steady lights at multiple levels give continuous illumination that outlines the structure’s height and shape from different angles and distances. This combination ensures visibility even in varying weather and lighting conditions.

Choosing only high-intensity flashing lights misses the steady, continuous cues that help gauge the structure’s size, while steady-burning lights alone don’t provide a clear top signal. A single rotating beacon lacks the multi-level, continuous identification needed for taller objects.