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18.5.3.1
The flash rate shall not exceed two flashes per second (2 Hz) nor be less than one flash every second (1 Hz) throughout the listed voltage range of the appliance.
18.5.3.2
The maximum light pulse duration shall be 20 milliseconds, except as permitted in 18.5.3.3.
18.5.3.3*
Light pulse durations greater than 20 milliseconds, but not greater than 100 milliseconds, shall be permitted where the alerting capability of the visual notification appliance is demonstrated to be equal to or greater than visual notification appliances with a 20-millisecond pulse duration.
18.5.3.4
The pulse duration shall be defined as the time interval between initial and final points of 10 percent of maximum signal.
18.5.3.5*
Visual notification appliances used for fire alarm signaling only or to signal the intent for complete evacuation shall be clear or nominal white and shall not exceed 1000 cd (effective intensity).
18.5.3.6
Visual notification appliances used to signal occupants to seek information or instructions shall be clear, nominal white, or other color as required by the emergency plan and the authority having jurisdiction for the area or building.
18.5.3.7*
The visual synchronization requirements of this chapter shall not apply where the visual notification appliances located inside the building are viewed from outside of the building.
18.5.3.8
Visual notification appliances used for carbon monoxide signaling shall be as required by the emergency plan and the authority having jurisdiction for the area or building and shall not exceed 1000 cd (effective intensity).

Related Code Sections

18.5.3.5 Notification Appliances,
Lights used to signal occupants to seek information or instructions shall be clear, nominal white, or other color as required by the emergency plan ...
18.5.3.6 Notification Appliances,
Visual notification appliances used to signal occupants to seek information or instructions shall be clear, nominal white, or other color as required ...
18.5.3.4* Notification Appliances,
Lights used for fire alarm signaling only or to signal the intent for complete evacuation shall be clear or nominal white and shall not exceed 1000 ...