Have had several different brands of night sights on 1911s, Glocks and 3rd Generation S&W semi autos...
So for the TruGlo TFO/TFX series far surpasses any of the others I have tried.
Have the TFOs on three Glocks and the TFX on a Colt Commander and plan on adding a set to at lest one more Commander and Government Model.
The dots are easy to see in ANY kind of light.
Bob