When light enters the eye, it is focused by the lens onto the back of the eye where there are millions of specialized cells that transmit the light information into a series of biochemical reactions that result in a chemical signal being sent to the brain. The brain then organizes that data into an image – the picture that is seen.
Consider Photopic, Scotopic, Mesopic Vision before Specifying Lumen Requirements
Commercial photometry is important for lighting installers and their clients in choosing the best locations to install fixtures as well as ensuring maximum efficiency of lighting systems. The science of measuring light, in terms of how the human eye perceives its brightness, is called photometry. …