Testing the emergency lights

I was on the basement of the building and i was testing the emergency lights if they are working. I did it during a power outage so many of the main lights are off. The duration of the test was around 30 minutes, i didn't want to be in the dark in the case that the emergency generator experience any problems! Olympia PROFESSIONAL LIGHT GR-110/2 combined with A-1013 module for flush mounted installation