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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.

The general term for emergency lighting fixtures. The fire emergency lighting system mainly includes accident emergency lighting, emergency exit signs, and indicator lights. It is set up to guide trapped personnel to evacuate or carry out firefighting and rescue operations after the normal lighting power is cut off in the event of a fire. However, in daily inspections, it was found that there are many problems in the selection, installation, and use of fire emergency lighting fixtures in the unit. Therefore, the reasonable selection of power supply control and wiring methods for the emergency lighting system, as well as daily maintenance work, directly affects the effectiveness of the fire emergency lighting system. In daily life, it is necessary to conduct regular examinations and take precautions.