If someone breaks in your home... just turn on the damn ceiling light.
You know, quite a few break-ins occur after events that cause power outages... like thunder storms, ice storms, etc.
It's also not unheard of for a burglar to cut the power to the house before breaking in.
As for shooting at shadows, as was mentioned earlier... it's not the best thing to be doing, but there's been at least a couple of instances that I know of where a homeowner did just that and it ended up saving his/her life. ( Anybody here in TN remember the incident with Charlie Chase's son? )
Then again, how many of you out there wouldn't shoot at a shadow or silhouette that was a foot taller than you and had a voice you didn't recognize... especially if you saw an outline that looked like it was a weapon? Gonna stand there 'til the lights come on? Think about it. Think about it very carefully.
The fact is, being able to see the sights on your gun in bad/no light is a
very good thing, when your life may depend on actually hitting what you're shooting at.
Oh, and as for lasers... they don't work so well when you shine them on rough, dark surfaces... like a wool sweater or black sweatshirt. Could take an extra second or two to find that dot, in an emergency... Will you have the time to spare?
Anyway... tritium sights won't hinder your shooting, and they very well could end up saving your life. So, are they worth having? You tell me.
J.C.