Since you are welcoming any opinions, here's mine. Lights on guns are a bad idea.
Light with a gun, fine. Light ON a gun, bad.
There is lots of discussion, including one in the T&T forum right now.
Essentially, my objection is that with a light on a gun, you will be pointing a (loaded) gun at someone, before you even know who/what that "someone" is.
The "trained operators" argue back that you can see who they are without pointing the light/gun directly at them. And, do they stick to their training, I can see this as true, BUT...
The majority of us are not, and never going to be those kind of "trained operators", and so, there is a significant increase in risk of an accident if you use a weapon mounted light. Just my opinion, and worth what you paid for it.
Rather than "patrolling your yard" with a weapon mounted light, why not just put in tripwires and flares?