<p>Reflection is the ability of surfaces to reflect light falling on them. The ratio of the original light falling on the surface and the light reflected off the surface is called reflectance. A matt white paint reflects about 80% diffuse. In rooms with low reflectances more light must be used to achieve a sufficient level of illumination<img class="buttons square13 zippy-plus" src="http://www.google.com/images/cleardot.gif" border="0" /></p>