In corridors with two or more visual notification devices, how should they flash?

In corridors with two or more visual notification devices, they should flash in synchronization. This is important for ensuring that the visual signals provide a coherent and easily recognizable alert to occupants. When the devices are synchronized, it allows for clear communication of an emergency situation, reducing confusion and helping ensure that individuals can quickly and effectively respond.

Synchronized flashing enhances the visibility of the alerts in a crowded or chaotic environment, where multiple sources of visual notification can overwhelm individuals if they flash at different times or patterns. This unified approach minimizes the risk of occupants missing an important alert, which is critical in emergency scenarios such as fire alarms or evacuations.

While alternating flash patterns, independent flashing, or random intervals could lead to a disorienting effect, synchronized flashing keeps the visual alert structured and straightforward for occupants to understand.