These are the "truths" of tritium sights... IMO.
You seldom know under what conditions you'll need to use a defensive weapon, but in many cases it will be in semi to total darkness.
Criminals who would break into or onto your property tend to work at night to conceal their activities. There is also a certain terror element to darkness that works in their favor... sometimes it can work in your favor.
You may have a flashlight, you may not. Flashlight training is a good thing.
Yes, there is such a thing as weapon and light training. The idea is to illuminate the bad guy to your advantage, rather than to illuminate yourself to them. Surprise is a key element to dominating and decimating your opponent.
Tritium sights last about 10-13 years before they're toast... individual results may vary.
Once you've "used" tritium sights (and honestly, few people have used them in the context that I'm considering) you will be hard pressed to not have them on any gun which does HD duty.
Most folks, luckily, have only looked thru them in the dark when they first get them and every few months there after... saying to themselves "Wooo... these are soooo cool!"
I have them on every shotgun, handgun and rifle I own that has the potential of being an HD gun. Some guns came with them, some I had to fit with them, but they all have them.
Cheers,
C