Their battery operation means they aren’t impacted by blackouts, so you're able to rely on your hallways and stairwells to stay illuminated and facilitate a peaceful, orderly evacuation.
All systems have to adhere to https://patch.com/north-carolina/raleigh/classifieds/gigs-services/467764/safeguarding-lives-and-property-all-american-fire-protections-quarter-century-of-excellence