There are different Prizm lenses depending on conditions – road, trail, snow etc.
The Clear Black Iridium ones are fine at night IMO, used to wear them on the road and found them fine. Like I say, only downside was the longevity. Oakley were quite flippant when I took them in – they lasted about 2 years, but not really usable now.
They go from as good as clear, to really really dark. Most photochromic lenses have quite a narrow range of transition.
They didn’t change my life, personally I find that my eyes adjust to whatever I’m wearing.