LED wall washer is a common type of lamp in outdoor lighting. Today, Xiaobian will introduce the PC shell or cover of low-priced LED wall washer on the market:

The main function of the PC shell of the LED wall washer is to mix light and prevent rain, so the shell is an important part of the lamp, and there is a cover on the outside. The material selection of the cover is a means for many non-standard enterprises to reduce costs. Some high-quality LEDs The wall washer will use anti-ultraviolet materials, but poor quality LED wall washers are often made of materials mixed with nozzle materials, not to mention anti-ultraviolet, and in places where the sun is relatively bright, the shell will turn yellow after less than a month. , so the luminous effect will be poor, and the light transmittance will be greatly reduced.

Disadvantages: Cracking caused by thermal expansion and contraction and internal stress.

LED wall washers generally work outdoors. Due to the influence of temperature difference, thermal expansion and cold contraction are the main reasons for the cracking of the outer cover. Therefore, qualified PC materials with a small coefficient of thermal expansion and contraction should be used to make LED wall washers. However, if you choose a material with a nozzle material, due to the different material properties of the material itself, the internal stress generated during the extrusion and drawing process is difficult to eliminate, and the outer cover is easy to crack when used outdoors.

Therefore, products with the same appearance are not necessarily products with the same quality assurance. To make a qualified LED wall washer, we must pay attention to every detail of the process, and it is also very important to know the selection of materials.