You are obviously in the trade or the engineering side.
I was in the wholesale hardware distribution business for 35 years. Sold a lot of lighting. But it was before the new options existed. I did sell sodium and mercury vapor replacement stuff. And quartz halogen lamps.
I have a commercial radio license and an Amateur Extra. But never worked in that field. I understand the theory pretty well, but optical radiation was not something I studied. Thanks for the clarification.
I’m supposedly some sort of engineer ... I don’t work in the lighting trade, though. For whatever reasons I have to know a few things about various light sources from the POV of spectroscopy. Most of my interest is actually in the infrared (SWIR 1000-2500nm). Professionally, I hate LED and fluorescent lights, as they produce nothing in that region. Quartz-halogen actually produces better SWIR illumination than visible.