In large or commercial spaces that require major lighting, photometrics play an important role. It allows architects and lighting designers to know if the light is enough for a space. It can confirm brightness, intensity, evenness of light and more. It also enables understanding of costs and allow for planning of electrical needs.
Photometric light study is the study of light itself, not just a type of lighting. Photometrics, photometric analysis and photometric studies are just different names of the same thing. It focuses on how a light leaves a fixture and goes into the surrounding area it is in. It is a computer simulation of light. It is very important knowledge for the people who are in the business of working with light fixtures and lighting design.