On my Transamerica ride I felt like Montana was the most dangerous state I rode in all things considered. I don’t really like the idea of them legislating this at all but maybe they know their drivers aren’t careful.
That's surprising to me and I'm sorry you felt that way! Of the 46 states I've ridden across on bicycle, Montana (which I've ridden through 3 times) is in my top 5 of safest.
Otherwise, I always ride with a taillight during the day unless I'm on a MUP. I rarely ride with a front light except in foggy or rainy weather. I would be against high visibility colors though. Most of my bike shirts are white, blue or even black. My bike is plenty visible IMO.
Yes that's just how it was for me on my one experience there. So there you go, it's gotta happen somewhere. By the way, what is MUP?
I also use a rear light always, and only use a front light periodically similar to your description. My personal experience was when riding through Yellowstone and into the Grand Tetons I teamed up and rode with a British guy who was on an around the world tour. He had a very bright tail light and I had one of the little Blinky things. Anyway as we entered the Grand Tetons a guy flagged us down and I thought he was a former bicycle tourist and wanted to chat about our ride however what he wanted was to tell the guy I was riding with how much he appreciated his bright tail light. He said he could see it way before mine and it caught his attention in the middle of viewing the scenery. It was a good enough testimonial for me and afterwards I bought a bright tail light that I always use.
This is a bit off topic but this past fall I purchased one of the Garmin Varia radar tail-lights and I completely love it. I have tried over the years to use various rearview mirrors - on the helmet and glasses and handlebars - and for some reason they have bothered me so much that I gave up using a mirror. But, the Varia - for me - it just works. In the few months I have used it, it has never missed a car. If I look down at my computer readout it tells me if a car is behind me and how far back it is. Anyway like I said "off topic." but my Varia is a combination radar and bright tail-light so it reminded me while I was typing.