A 30-second emergency lighting test is required every:

• A. Week
• B. Month
• C. Day
• D. Year

Answer: (B)

Regular functional testing of emergency lighting is essential so the system will light automatically when normal power fails. The 30-second duration is the standard monthly test. It’s long enough to confirm that the lamps illuminate and that the battery and control circuitry are operating, yet short enough to minimize wear and battery drain. Testing this frequently on a daily or weekly basis isn’t required and would be unnecessarily burdensome, while waiting a year would leave the system unchecked for too long. In contrast, the longer, full-duration test—usually around 90 minutes—is performed annually to verify that the emergency lighting can sustain illumination for the entire required period.