How to Find a Leading Digital Billboards Supplier
Too Many Digital Billboards Leaders
Recently I find a lot of new companies claiming on their websites to be "Leader in Digital Billboards Manufacturing, or to be a "Leading Digital Billboards Supplier"...
Luminance (also called luminosity) is a photometric measure of the density of luminous intensity in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. It is measured in candela per square metre (cd/m2).