Welcome!
I, too, came to forums to get help with my first "modern" flashlight.
"Tactical" brings its own special set of requirements. Most of the time, when folks say they need a "tactical" flashlight, they are just repeating advertising phrases. When the term is more fully explained, they realize that's not what they want. I'm not sure if that describes you, but for the general reader, let me explain.
Some in law enforcement require a rear switch that is momentary only. That means you've got to press down and hold to get light. As soon as you release, the light goes off.
A "forward-clicky" switch is not good enough. That's a switch you can press half-way (and hold) for momentary operation. When you press all the way down, however, the flashlight clicks on, and stays on after you release. Cops don't like that because they don't want to be surprised if they press too hard, and their flashlight suddenly clicks on, exposing their position.
In addition, some in law enforcement want only one mode when they press the rear switch. They want full power only. Once again, they don't want to be surprised to find their flashlight is in the wrong mode when they go to use it in an emergency. A side switch might provide other modes, but the rear switch must always go to full power.
Another requirement is to have a protruding rear switch. The switch should not be recessed inside a guard or tail-standing rail, even if the rail only blocks half of the flashlight's circumference. Cops don't want to be fumbling when they reach for the switch.
There may be other concerns affecting LEO. Proven durability comes to mind. Some of the pros on this site may be able to explain further. Since I am not a cop, however, I have probably said as much as am qualified to say (which is not a whole lot!).
So now, the question: is this the kind of tactical flashlight you are seeking?
One other thing: for longer run-times, consider a flashlight that takes a 2170 battery rather than an 18650.
Good luck in your search!