Luminosity has dethroned "xenon" as the most abused word in automotive lighting parlance. Luminosity is a term best left for astronomers and not people who dea

Luminosity has dethroned "xenon" as the most abused word in automotive lighting parlance. Luminosity is a term best left for astronomers and not people who deal with automotive lighting. Luminosity has units of Joules/second and is the measure of all the electromagnetic radiation emitted by something. This is obviously more relevant to something like, the Sun, which emits significant amounts of not only IR radiation but also visible light and UV radiation. Luminosity has 0 relevance to automotive lighting because last time I checked, the human eye is unable to perceive IR radiation. We don't drive at night with the aid of IR radiation. Unfortunately, this simple fact has been lost on the people who attempt to sound smart when pushing their latest and greatest illegal HIDs/LEDs and projector retrofit kits.