I know everyone will have a different opinion on this and so what I'm saying is just MY opinion so don't shoot me, LOL
Night sights may be cool but I personally have no interest in having them on my defense weapon. Others may want them, and that's fine. Just not me. I do have the white dots painted on my front and rear sights. Fine. They're not glow in the dark and in very low light they are highly visible. In the dark they are NOT visible. So what good are they if they're not visible in the dark? Let's put it this way. If I can't see my sights because it's too dark, I'm not going to be able to see the BG. So even if I have night sights which may glow in the dark, how am I going to line them up on a target I can't see? Again, folks, this is just my opinion and I am not intending to tell anyone else what they should do, so humor me just a little.
I have tested it out. I've walked into semi-dark to dark rooms within my house trying to simulate the conditions I might be faced with a home invasion. When the light level is just enough that I can see an object I have designated as representing an intruder, and see that object as an area of dark against the background, you know the level of light I'm talking about, at this time I can still see the white painted dots. When it is darker and dark to the point where I can no longer see the white dots, at this point, I cannot see the target object at all. So I am saying that the loss of visibility of the target will occur well before the loss of visibility of the sights is lost. So even with the most high-tech night sights, you may still see the sights but you will not see the target to line the sights on.
Now a different type of vision and aiming has to come into play. Remember, you are in YOUR world. Not the bad guy's world. You know the layout of your house. He does not. You know if a slightly darker than the background object is the standup mirror of a dresser, a table lamp or the head of an intruder which is creating a darker spot against the wall where you know nothing should otherwise be. That is, while you can still see anything at all.
Of course we know that unless you live in a cave, you're never going to be in total darkness in you own home but the shapes are going to be rather indistinct so even if you see something, you're not going to have a distinct target you can center on with any sights. You don't want to be changing the focus of your eyes to place the front sight on the target like you will do at the range. The instant you do that, you have lost the image of the target in the darkness.
This is where I believe you have to learn the pointing aim. When you are pointing the gun, you won't see the gun. I know, I'm going to be jumped on for that statement but bear with me. How many of you were taught how to see targets in darkness? I presume they still do that even in Army basic training. It was sure stressed and practiced when I was wearing the uniform. If you're in the dark and you see an object (try it in your bedroom at night), let's say a lamp standing on the dresser on the other side of the room. Stare at it for a few seconds. Remember, it represents a BG and you want to keep your eyes on him so you can draw a bead on him. Stare at that lamp for a few seconds and it will disappear. You will no longer see it. What I was trained to do was to sweep the field. the optics of the eye are such that for night vision, a little off centre is going to be the most sensitive and thus able to pick up what cannot be seen with the optic cells (the term is escaping me right now) in the centre of the eye. Sweep the eyes around that lamp to the left and to the right but never landing on it directly and it will be visible. It's been many decades since I was taught this but it is still instinctual to me. Not that I'm seeing bad guys in my house all the time (thank God, I never have) but just maneuvering around if I want to go into the kitchen for a drink of water in the night without turning on the lights.
Now with that, how are you going to line up a three point sight aim on what will disappear from your vision if you look at it for more than a few seconds? You aren't. At least I don't think so. But if you can "see" the target this way, can you point your finger at it and have your finger be right on the target? Yes. If I can point my finger at the target, and my brain without my conscious help seems to know how to do this, my gun should point where my finger does.
Again, my disclaimer. Just my thoughts and training. As the old car commercial said, "your mileage may vary."
