Select NFPA 72 requirement for visual appliances with photosensitive epilepsy.

Select NFPA 72 requirement for visual appliances with photosensitive epilepsy.

• A. Must be color-coded blue.
• B. Must be synchronized.
• C. Must be loudest audible.
• D. Must be placed only outdoors.

Answer: (B)

Visual signaling devices must be synchronized. When multiple strobe lights flash in the same space, coordinating their flash timing avoids irregular, uncoordinated flicker, which can trigger seizures in people with photosensitive epilepsy. NFPA 72 requires that visible notification appliances within the same area or zone be synchronized to provide a clear, predictable signaling pattern for occupants. The other options aren’t related to reducing epilepsy risk: color coding isn’t a mandated feature for this purpose, the requirement isn’t about making strobes the loudest, and placement isn’t restricted to outdoor use.

Visual signaling devices must be synchronized. When multiple strobe lights flash in the same space, coordinating their flash timing avoids irregular, uncoordinated flicker, which can trigger seizures in people with photosensitive epilepsy. NFPA 72 requires that visible notification appliances within the same area or zone be synchronized to provide a clear, predictable signaling pattern for occupants. The other options aren’t related to reducing epilepsy risk: color coding isn’t a mandated feature for this purpose, the requirement isn’t about making strobes the loudest, and placement isn’t restricted to outdoor use.