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When the high building is on fire, the exit passage is critical to escape. As many people do not know the fire situation, they probably choose a wrong exit passage. As a result, they miss the best opportunity to escape.
The existing safety exit lights do not provide effective instruction information, isolate from each other in a building and just offer exit direction information. Network light links all lights to a system. Network light collects fire information by sensors and transmit among them. Through red and green arrows show the direction of safe passage, survivors can win precious time to escape.