Fiber optic sights are good for tactical target shooting. Bad if you intend to be in dark rooms without a light source. In pitch black you won't be able to see your FO's. But if you are anywhere you need night sights it might be prudent to have a weapon light of some kind. I keep thinking about our low light scenario shoot this last league. Night sights were a must if no flashlight was available, but even then a flashlight (weapon mounted even better) without night sights may have been a better choice. Try it in a realistic scenario where you have enough light to identify your target and see if you can't pick up those sights.
Disequilibrium facilitates accommodation.
9mm vs .45 ACP? The answer is .429