Are emergency lights AC or DC?

Emergency lights can be powered by either AC (alternating current) or DC (direct current) sources. AC-powered emergency lights are connected to the building's electrical system and are typically used in larger buildings or commercial settings.
DC-powered emergency lights, on the other hand, are typically used in residential or small-scale situations and rely on battery power. In the event of a power outage, DC-powered emergency lights provide illumination for a limited amount of time before the battery dies. This is why it's important to regularly test and replace the battery in these types of emergency lights.
There are also hybrid or dual-powered emergency lights that can operate on both AC and DC power sources. These provide extra protection and flexibility in the event of a power outage.
Regardless of the power source, emergency lights are an important safety feature in any building. They help guide people to safety during emergency situations, such as fires or severe weather events. It's important to make sure that emergency lights are well-maintained and regularly tested to ensure they work properly when they are needed most.