（1） Non centralized control system with built-in power supply: In normal working conditions, the mains power supplies the lamps through the emergency lighting distribution box for normal operation and battery charging.
When a fire occurs, the emergency lighting distribution box in the relevant fire compartment acts to cut off the mains power supply line of the fire emergency lighting fixtures. The working power of the lighting fixtures is provided by the built-in battery inside the fixture, and the fixture enters an emergency state to provide emergency lighting and evacuation instructions for personnel evacuation and fire operations.
（2） Self contained power centralized control system: In normal working conditions, the mains power supplies the lamps through the emergency lighting distribution box for normal operation and battery charging. The emergency lighting control box achieves centralized monitoring and management of fire emergency lighting fixtures by monitoring their working status in real-time.
When a fire occurs, the emergency lighting control box receives the fire linkage signal and sends control commands to the fire emergency lighting fixtures, controlling the emergency lighting distribution box and fire emergency lighting fixtures to enter an emergency state, providing lighting and evacuation instructions for personnel evacuation and fire operations.
（3） Centralized power supply non centralized control system: In normal working conditions, the mains power is connected to the emergency lighting centralized power supply for normal operation and battery charging. The output of the emergency lighting centralized power supply is provided to the fire emergency lighting fixtures through the emergency lighting distribution devices set in each fire compartment.
When a fire occurs, the power supply of the emergency lighting centralized power supply is switched from mains to battery, and the centralized power supply enters the emergency working state. The fire emergency lighting fixtures powered by the emergency lighting distribution device also enter the emergency working state, providing lighting and evacuation instructions for personnel evacuation and fire operations.
（4） Centralized power supply and centralized control system: In normal working conditions, the mains power is connected to the emergency lighting centralized power supply for normal operation and battery charging. The output of the emergency lighting centralized power supply is provided to the fire emergency lighting fixtures through the emergency lighting distribution devices set up in each fire compartment.
When a fire occurs, the emergency lighting control box receives a fire linkage signal and issues control commands to the emergency lighting centralized power supply, emergency lighting distribution device, and fire emergency lighting fixtures. The control system switches to an emergency state, providing lighting and evacuation instructions for personnel evacuation and fire operations.
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