Patients and visitors to hospitals, care homes and clinics may be unfamiliar with their surroundings. So, it is important that the emergency lighting sufficiently illuminates corridors to a minimum of 1 lux, and open areas to a minimum of 0.5 lux. This is to ensure that people can quickly exit the building in the event of a loss of mains power.
Patients may be unable to move quickly, so may exit the building via a trolley or wheelchair. As a result, it's vital that lighting for healthcare emergencies must account for nurses and orderlies. This is so they can easily help patients leave the building, with clear visibility in the escape routes.