Update on greenhouse coverings©
Most glazing materials are now available with additives that diffuse light. Research has shown that although light transmission is reduced a few percent, the light will penetrate better into the mid leaf layers of tall crops on cloudy days. There is no reported difference in light transmission on sunny days. Diffuse light can also reduce scorching, lower container temperature, reduce fungal spores and decrease insect propagation.
Bartok, J.W. (2017). Update on greenhouse coverings©. Acta Hortic. 1174, 205-208