Emergency lighting has three components: exit lighting, emergency fixtures other than exit lights, and photoluminescent signage and marking devices.

Non-exit emergency lighting fixtures direct occupants to the exits and provide lighting within the exit, for example in stairways.

Another measure is photoluminescent marking devices like signage and tape. Activated by ambient light, these devices should remain active for a minimum of eight hours after building lights go out. Typically applied 12 inches off the floor to lead occupants to the stairways, the devices are also used in stairwells to mark floor levels and directions.