Thanks, UV enhanced seems likely.
Re choosing colours (or anything), choose for actual purpose. A broadband or tunable source is useful for testing what sort of coatings are there, or looking for deficiencies, but the proof of a pudding is in the eating. A chef might know the science of the food, but it takes more than that to make a good chef beat the best mass produced recipes, and the best chefs include many who don't worry much about food science at all..
People set great store on fine analysis, but improving beyond the best current references needs more than science; it's an art. It's the difference between a technician and a toolmaker. I think it's usually enough to know enough science not to make obvious errors or inefficiencies, but after that a bit of creative work goes further than deeper adherence to standards.
One off-topic case of that is something I'm about to raise in a separate thread, something I worked out as seeming like a good idea, but definitely NOT standard. That's using scanner arrangements that are not orthogonal. I worked out that the improvements are such for a given beam width and scan angle, that improvements in speed should be possible by reducing mirror sizes. I don't know why it's not done, or even if the idea is as good as it seems, or not, but I'll deal with that in the thread when I've made a few files ready for it. I only mentioned it cos we're talking about mirrors and angles, and this business of light at various angles would be important to that idea...