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Emergency lighting is different from ordinary lighting, which includes three types: backup lighting, evacuation lighting, and safety lighting. The conversion time is determined based on actual engineering and relevant regulations. Emergency lighting is an important safety facility in modern public and industrial buildings, which is closely related to personal safety and building safety. When a fire or other disaster occurs in a building and the power supply is interrupted, emergency lighting plays an important role in personnel evacuation, fire rescue work, and the continued operation or necessary operational disposal of important production and work.

Compared with independent control emergency lighting fixtures with built-in power supply, centralized control emergency lighting fixtures with centralized power supply have advantages such as easy centralized management, user self inspection, fire supervision and inspection, extended lamp life, and improved emergency evacuation efficiency. The system has good reliability, long service life, convenient maintenance and management, and low system price. However, centralized power supply and centralized control emergency lighting fixtures do not have a backup power supply (battery) inside each emergency lighting fixture. If the power supply line fails, it will directly affect the normal operation of the emergency lighting system. Therefore, there are special fire protection requirements for the laying of its power supply line. And the independent control emergency lighting fixtures with their own power supply have no special requirements for the power supply line because each emergency lighting fixture is equipped with a backup power supply (battery), and the failure of the power supply line will not affect the function of the backup power supply. When an emergency light fails, it usually only affects the light itself and has little impact on the entire system.