I have Meprolite night sights on two pistols, and I like them a lot. They have crisp edges and were an improvement over the factory sights regardless of lighting. I used to have a Hi-Viz fiber optic on a Ruger P91, but lost the element after about a year of hard use, and that left kind of a bad taste in my mouth for that brand. But since an SP front sight doesn't get slammed back and forth with slide movement, it may be just fine, but Mepros are my go-to sights for personal defense handguns and my Mossberg 590.