emergency lightening

• 应急照明

emergency lightening的用法和样例：

例句

1. In the event of a power failure the emergency lighting comes on automatically.
   万一停电，应急照明设备会自动开启。
2. Fire Emergency lighting is crucial in evacuating when a fire happens.
   消防应急照明是人员在突发事故情况下安全疏散的重要保证。