A normal situation in the Police world is just dealing with people, answering calls, making traffic stops, patrolling, etc, etc, etc. Pretty much everything you see on Cops.
A tactical situation in the Police world is when you have to go into a place (Building, Factory, House, Back yard, School, Forest, Graveyard, Bus, Airplane, Junkyard, etc) knowing that there are people inside who are/are possible armed. You also have to be in the mindset they want to kill you.
HOWEVER, doesn't mean you just shoot.
Normal situations the citizens know your there, your actions are just "working the beat".
Tactical situations require you to find people or look for people who you don't want to know what you are doing.
It's a SWAT team storming a barricaded mans house. It's a patrol officer chasing someone into a building for some reason and then having to find him. It's an open door and then the officers having to clear it. It's a man with a gun who ran into a wooded area.
You aren't going to go into the situations standing straight up, walking like your checking out the roses, talking about the football game.
Your going to have you body, weapons, and gear into positions where you can quickly and effectively have your sights on a person before they can you, and hopefully surprising them, so they can't do harm to you or your team.
At night, you aren't going to have your flashlight on the entire time. Your going to flash -> move, flash -> move, etc, etc, etc. in order to keep your exact location unknown so a subject can't shoot you and you not even see him.
To add a little something. In half the situations the subject/s is going to know you are there obviously so sometimes you storm places quickly with force (and sense) to overwhelm them and control them before they take action.
I'm not good at explaining.
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The flashlight that you can twist the bezel and go into strobe modes has an overwhelming flaw. That strobe mode by twisting the bezel is in NO WAY tactical.
It's impossible to twist a bezel with a gun in the other hand. It will never be holstered until that specific situation is over and then why would you need strobe? Keeping it in that strobe mode is also very wrong because strobe is meant to be an addition to a light source, not the light source.
The ones with the side button was a good idea except for one thing.
You have to be holding the light in your hand with your thumb on the switch to be able to activate it easily. Easy is better, no complicated finger moves or it's no longer tactical.
It would also mean only one hand holding the gun and you just lost accuracy. If you can't hit your targer.. then why did you even sign up for this.
Using the Rogers/SureFire technique, which is dominant from what I've seen, you can't hit the side button on purpose. You can hit it on accident and if you didn't even want light, your position is blown and your team is going to kick you in the ***..
With all due respect, your CPF profile says you are 20 yo, and thus aren't even old enough to legally buy a handgun in the US yet. So, just what is your world experience to be able to say with authority that the cigar flashlight method is "dominant" from what you've seen? You've seen it all?
And to say only search, entries, and the like are "tactical situations", while everything else is not is patently false. Ever hear of the "routine traffic stop" that wasn't? Yet, you put traffic stops in the non-tactical situation category.
Everything involves tactics. Ever position your vehicle at an angle to provide more cover if necessary? Position yourself to the side of the driver, not squarely in front of him? Use your vehicle lights to illuminate the stopped vehicle interior and to get some light reflecting off his mirrors so that his view of your approach is degraded? When you talk with someone, ever use a bladed stance, perhaps combined with the "Jack Benny" arm positioning? Tactics.
Re: one handed shooting. You had better practice it. There is no guarantee that you will have two hands available. Since cop hit rates presumably with 2 hands is already at around 20%, it seems to me that any complaints about inability to make hits with one handed shooting miss the point.
Not sure what kind of side button light you are talking about. If you are talking about the old Maglites and similar lights, you can use the Chapman method and get just as good of a two-hand hold on the gun as with the cigar method.
Re: bezel twist interface. I note that your sig line includes the Fenix PD30, which uses this exact UI. I also note that the PD30 has a Turbo mode that includes Turbo and Strobe. So once you select that mode (ahead of time), you can operate in Turbo exclusively if you so choose. If you want Strobe, you soft-press the tailcap button. To get back to Turbo, soft-press again. No further bezel twists necessary. So, the knock on the bezel twist UI really depends on how it is designed.
I also note that the PD30 can tailstand because it has a recessed tailcap button. Kind of makes it more difficult for the cigar method, doesn't it? If you are going to carry a light, it might be a good idea that its operating characteristics match those of your other lights. Otherwise, you are going to be in for a rude surprise when you can't switch to your favorite light because of exigent circumstances and have to go with what you have in-hand. Operational consistency IMO is part of your "simplicity" argument.
FYI, flash, move, flash, move is a version of strobing. The strobe rate can be moderately fast, say 4-5 Hz, or slow, say 0.5-1 Hz. And as you say, strobing can be useful "in order to keep your exact location unknown so a subject can't shoot you".
Also, strobing doesn't mean that there has to be a dedicated strobe function built into the flashlight. For a long time, we used manual tailcap presses on our SureFires.