Night sights are a gimmick, and all but useless, I believe.
If it's too dark to see your sights, can you tell at whom you're shooting?
Better: Buy a really good flashlight, and learn to use it properly while preparing to shoot, and while shooting.
If it ever comes to shooting at a known bad guy in the almost-dark, you will find that if you have practiced so-called "slide shooting," that is, using the silhouette of the rear end of the pistol as an aiming guide, you can easily make accurate hits at inside-the-house distances.
I find that bright, easy-to-see night sights swamp my night vision, and make things worse.
I also find that less-bright night sights still act as "magnets" to my eyes, and keep me from focussing on the bad guy and toward where he is moving.
Thus, I believe them to be more of a distraction than an aid.