Emergency lights are permanently mounted lights that automatically turn on during a power loss within building. They draw power from their internal batteries and are designed to provide light for a minimum of 90 minutes. These lights are typically used to light pathways leading to exits from offices, stores, warehouses, and other buildings. They help prevent injuries by allowing people to find their way out of a building. They also supply light for first responders or maintenance personnel working within the building during a power outage.