What function checks the status of the Light Emitting Diodes (LEDs) on the Fire Alarm Control Panel (FACP)?

The lamp test is a specific function that is used to check the operational status of the Light Emitting Diodes (LEDs) on the Fire Alarm Control Panel (FACP). During a lamp test, all LEDs illuminate, allowing the personnel to confirm that each indicator light is functioning correctly. This is essential for ensuring that the control panel can effectively communicate the system's status and any alarms.

In contrast, functions like system status checks and diagnostic tests refer to broader assessments of the fire alarm system, including its overall readiness and functionality, rather than specifically testing the LEDs. Alarm verification is a process related to confirming whether an alarm signal is genuine or a false alarm. Thus, the lamp test accurately targets the assessment of the lights on the FACP, making it the correct choice.