Emergency exit lights are special lights designed to guide people safely out of a building during an emergency, such as a fire or power outage. They are usually placed above exit doors and along evacuation routes, ensuring visibility in low-light conditions. These lights are often powered by backup batteries, allowing them to function even when the main power supply is interrupted. These lights are typically marked with a green or red exit sign and are required by safety regulations in many public buildings. Regular maintenance and testing are essential to ensure that emergency exit lights are operational when needed, helping to protect lives during emergencies.