I've gone full circle... tried the early night sights, have had to replace a couple sets... if they don't glow, they are just black sights, had several early battery powered sights... now anything hunting or even remotely tactical gets fiber optic... I had guns put away in a bug out bag, that the night sights went dim... I paid through the nose 15 years ago... & almost never used them... I can always change the batteries on my tactical flashlights... I've found that most any shooting light where I could positively identify the target, that fiber optics will glow at least enough to be able to get the gun pointed in the right direction... I've found the orange fiber optic tubes to be the brightest over green or red, so I usually use orange & green rods, as they give me good contrast & brightness