Clear PMMA can reach about 92% light transmittance under ASTM D1003 testing. For diffuser sheet applications, the value is usually adjusted through formula design, surface texture and haze control. Many LED panel light projects use diffuser sheets with about 80%–92% transmittance, depending on LED spacing, fixture depth and target brightness.

The lifespan of optical diffuser materials depends on resin type, UV exposure, working temperature, lighting power, installation environment, and cleaning method. In LED lighting projects, a good diffuser sheet should not only look uniform at the beginning.