What must emergency lighting in commercial buildings do according to code?

Emergency lighting in commercial buildings is crucial for ensuring safety during power outages or emergencies. According to code, it must automatically illuminate if the main power fails. This requirement ensures that occupants have immediate access to adequate lighting to safely exit the building or navigate to safety during a power failure, which can occur at any time, regardless of whether it is day or night.

The other aspects of emergency lighting, such as providing illumination for a certain duration or having backup systems, are important considerations as well, but the primary function is the automatic activation during a power failure. This capability minimizes risks associated with panic, disorientation, or visibility hazards in potentially dangerous situations. Effective emergency lighting can significantly enhance the safety and functionality of commercial spaces during emergencies.