Brighter is not always better. Try pointing a 10 million candle power spot light at a wall directly in front of you. You get a lot of the light back in your face, which will destroy any night vision you've built up. Light off a ton of light inside a small room from working with tasking light. Everyones blinded, including you.
You don't run through the area with the light going full blast the whole time. You use light etiquette in order to ID your target, then disengage the light while you are advancing.
This can differ from absolute zero light to full bore, or from tasking illumination to full bore. Lighting (including some lasers) like tracers work both ways.
I prefer the 125 lumens over the 225 simply because it is easier on your eyes to adapt back and forth.
Now you can discuss differing colors of illumination on which benefits what you're doing the most. IE: Huntings, maintaining night vision, tracking blood and so on.
For most civilian use, the light is simply a device to ID the subject before dealing death. There is usually very little tasking, or attempting to close with the subject for a non lethal takedown.
As for tasking in IR, you'll begin hearing that criminals are becoming much more sophisticated. As with my house, I have security cameras established that can see into the IR spectrum. Subjects closing with active IR equipment are going to show up like a joker flashing around a regular flash light. These cameras start at 150 dollars and up. Note the major migration to passive night vision because of this problem.
-Steve