The C919 aircraft will conduct tests concerning the passenger cabin, lighting and external noises.

C919飞机将进行有关客舱、照明和外部噪音的测试。

Manufacturers and airlines are increasingly  recognizing the value of cabin lighting for a variety of reasons - even some you  might not think of.

出于各种原因，制造商和航空公司越来越认识到机舱照明的价值 - 甚至有些您可能没有想到。