Light diffusion (how light is spread) can significantly decrease dazzle and glare from the different surfaces and objects in a room. The more diffusely and evenly the light is spread the better dazzle and glare are prevented. Both Akutex surfaces have light diffusion above 99%. However this method is measuring at an angle which in reality means that you are looking at the ceiling almost perpendicularly. Therefore it does not describe the whole picture regarding how to look at a ceiling surface. Most of the time you are looking at the ceiling surface further away in a room, and then this value is not telling the whole truth.