Under the overall umbrella of «Sport» mode, for example, you can make tweaks to parameters such as throttle mapping, steering feedback, transmission shift point, when the rear wings pop up, and even
how bright the headlights are.
These measurement actually take distance in account, they don't care of the angle of a cone of light or its intensity per se, If you want you can consider them as a measure of the results of all the defined above as they will indicate
how illuminated the target surface is and its what changes when we say that one
headlight is
brighter than the other