How to distinguish the good and bad LED plastic profiles?

Because of the improvement of living standards, people's pursuit of things, whether spiritual or material, will be relatively high, especially the quality of products, the same is true for PC lampshades, the quality of LED lamp accessories will determine the quality of finished LED lamps, so a product The quality should be grabbed from every gadget.
PC lampshade is a product made of PC raw materials, which is specially used for fluorescent lamp shells and some projects. For example, in the lighting tools on buses, there are also PC lampshades. For friends who purchase PC lampshades, how to distinguish the good and bad of PC lampshades? This is a question worth discussing. Today, I will introduce to you:

First of all, a good PC lampshade has to start from the raw materials. At present, the UL certification is generally used. Secondly, there are many models in the PC material. This is also worth paying attention to. Different models have different quality and price. Far.
The second is the problem of light transmittance. Some customers have very high requirements for light transmittance, and some PC lampshade manufacturers cannot do it. Another is the problem of appearance, which are generally light spots and dark areas. And other problems, these general high-quality PC lampshades can be solved.