Open mold white plastic shell, installed in the inside of the LED light, resulting in the entire shell have light signs, how to deal with it

Surface translucent with the internal surface treatment method is the most effective, spray a layer of black paint can be, but need to cost, and will make the defective rate much higher. It is recommended that you use it when other methods are ineffective.

Material transmittance, transparent or translucent caused by light leakage, you can try to improve the transparency of the material. Even though it's white, if it's completely opaque, the light shouldn't leak out. Increasing the ratio of titanium dioxide when mixing the material should have an effect.