State laws, legal precedent....
In general(which is like talking to someone in a gun shop parking lot or "bar talk"), I would say
no.
Use of CCTVs, FLIR, night-vision, drones-quad copters, scopes/telescopes, etc may aid you or give you warning
but it can't replace having "eyes on" a threat.
Recent legal cases that involve home owners/gun owners using lethal force on trespassers document this.
The incident in MN with the home owner who reportedly "lied in wait" & set upon 2 young house breakers, killing both. He was later
convicted.
The gun owner/property owner had lights, alarms, CCTVs, etc.
That strange case is worth reviewing. The guy seemed really creepy. He recorded his
own remarks before & after the shootings which helped the jurors hammer him later in court,
.
The other Detroit MI area incident where a home owner fired at a girl strung out on weed who reportedly was pounding on his front door at 300am. He fired a 12ga shotgun thru the closed door, killing the girl.
He was recently convicted too. If you can review that case & watch the court video of the MI prosecutor
screaming at the guy on the stand.
I'm surprised the court judge allowed that outburst but the guy was smoked after that.
Some state laws & lethal force standards are different in different places.
This why it's so important to
learn or know the fundamentals of lethal force laws in your area. To have a lawyer or legal plan like
www.ccwsafe.com or Second Call is smart too.
If you have a property or business, Id check the insurance plans or speak to your business atty & see what legal or civil issues are involved with guns/lethal force.
Waiting until you are in the after-math of a critical incident or a civil lawsuit will be to late.