The aim of this book is to provide an insight look into the illuminance in the automotive industry concerning the front headlamps and low beam of light. The book is engaged in the summary of key points related to light and lighting matters; an explanation of terms related to the human eye and vision. It studies traffic accidents statistics in this matter and lighting legislations following the recent development. It mentions a short description of various directives, standards and related laws. The next part deals with a detailed description of the illuminance measurement, i.e. the place, cars, headlamps, the measuring device, and conditions. Subsequently, the work is focused on the measured data analysis presented in isolux diagrams, errors in the measurement, and uncertainty problems. The third part represents examples of usage in praxis – characterization of a glare, its definition and types, application of anti-glare system on motorways.