I'm getting nitesiters......they don't claim to be tritium, and they aren't.....I have my 1911 now with tritium, and they are......different. Maybe brighter, I dunno, but you don't have to charge them. But these are great for 10 bucks and work on any gun.....many guns you can't get tritium for, and even if you could, it's an expensive proposition. And the guy that makes these seems to be really good at standing by his product. One ever quits working? Send him an email and he will replace it, free of charge. Falls off? Same thing. How often do we see a person willing to back their products like this anymore?