Everything depends on what your tacticool mission requirements are. Tactical doesn't define a single requirement. . .
Figure out what you are trying to do and find tools that you can use to accomplish your goals.
I agree and initially wrote a much longer post about this. I have about 6 low light tactics I've gradually developed and each has it's own different light.
Unarmed search--Wolf Eyes Boxer 24W HID
Unarmed ambush/sudden contact (vehicle or pedestrian stop, for example)--Surefire M6 (due to the Boxer's 20 second warm up time)
Armed ambush/sudden contact (high risk vehicle or pedestrian stop, respond to officer under attack)--Surefire X-300
Long range search/spot and coordination with other assets--Costco HID and Greatland green laser pointer
Low observable stealth--Novatac 120 low low
Off duty and all other on duty tasks like handcuffing--Nightcore Extreme
In very dark areas, I use NVG's for everything except the last one in concert with all of these lights, lasers, IR illuminator, or no lights as the situation dictates. I don't actually use terms like "unarmed ambush/sudden contact" in my own mind. I just think, "Here they come, no weapons, Surefire M6, lockout disabled, check. IR illuminator on." Or, "Bravo 4 has some problem children. Get the X-300 on the gun and contact them."
These are just specific to my job and situation. They don't necessarily translate to Afghanistan or even South Central Los Angeles.