At what time intervals should emergency lighting tests take place?

• A. 7 to 9 weeks
• B. 3 to 5 weeks
• C. 2 weeks
• D. 12 weeks

Answer: (B)

Periodic testing of emergency lighting is done to ensure the lights will operate from battery power during a real outage. Running tests on a roughly monthly schedule catchs issues with batteries, lamps, or wiring before they fail when you actually need them. That’s why the interval of three to five weeks aligns with the common practice of monthly checks. The other options spread testing too far apart (twelve weeks is quarterly) or are more frequent than typically required (two weeks) or don’t fit standard maintenance calendars (seven to nine weeks). In short, checking emergency lighting about every month keeps the system reliable without unnecessary testing.