Look at it this way: if the gun is going to be CCW'd the sights are going to be in darkness, they will not glow after being drawn.
Open carry holsters can allow illumination of the rear sight, but the front is almost always going to be in darkness... and if the rear sight is being illuminated, that means it's either daytime or your in a very bright environment, both of these don't require any form of glowing sights. Also you want the FRONT sight to be glowing and most visible as that is what you should be focusing on, not the rear sights!
And for home defense, the sights won't be glowing after more than a few minutes after you switch off your lights at bedtime, especially if the gun resides in a holster or safe.
The ONLY time these sights even remotely make sense is if you have the gun drawn in daylight and then move indoors into a dark area. That's more likely with law enforcement. I can't really imagine a realistic scenario where an average citizen would be doing that.
They literally are the stupidest, most gimmicky things out there. Either get proper night sights that glow 24/7, 365 days a year for a decade or better under ALL conditions with NO charging required, or just get some good high contrast steel sights for the gun.
Their sole purpose IMHO is to add a cheesy "feature" to what would otherwise be plain steel sights for guns that ship with cheap breakage-prone plastic sights and YES I've broken Glock plastic sights and chewed up Walther plastic sights just from normal use. Some seem to think plastic pistol sights are A-OK. Get off the keyboard and actually use your gun and you'll find they simply suck. It's a shame that it has become commonly accepted as fine to buy a $500 to have it show up with plastic sights.
