How to find ceiling lights wholesale?

Waterproof test , is the fourth step of the testing process , can test the IP class of lights products . It will simulate the thunderstorm weather , to detect the waterproof degree of the product . So it is important for the lights ,specially for outdoor lights.

More video of led commercial lights factory China details please click:

https://www.youtube.com/channel/UCmxuANIo4JNIIcx8DvTmSfQ/videos

 

 

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