What is the maximum intensity of a fire alarm strobe light?

The maximum intensity of a fire alarm strobe light is standardized to provide effective visual signaling in emergency situations, ensuring that all individuals, including those who are hearing impaired, can be alerted to the presence of a fire. According to the National Fire Protection Association (NFPA) and Underwriters Laboratories (UL), the appropriate maximum intensity for strobe lights used in fire alarms is set at 1,000 candela (cd).

This intensity allows the lights to be visible over a wide area and effectively captures attention, even in brightly lit environments. Strobe lights at this intensity are crucial for ensuring that the warning signals are noticeable quickly, thereby enhancing the safety measures during emergencies. This is why the intensity of 1,000 cd is recognized as the standard in fire alarm systems.

Other options, such as 500 cd, 1,500 cd, and 2,000 cd, do not align with the established norms for fire alarm signals. While a lower intensity could be insufficient for adequate visibility, a higher intensity may lead to discomfort or could even be deemed excessive for typical applications in emergency signaling.