I have found what I think is a good deal on tritium sights for my gun (Taurus PT92) @ under $40. I have also heard that tritium is bad in daylight and fades after 4-6 years so the nighttime use has a limited lifetime. I have a surefire that I keep in the mag pouch of my holster, but it does not attach directly to the gun and is kind of clumsy to shoot with. Does anyone have experience with these and what are your opinions? Or any other affordable suggestions for night shooting. Oh, don't know if it matters but they are IMX brand sights.