Another use of "light source" IR/II in the troop context ,is, the tank that just turned on their "hey, I'm over here (light)" the crew would have to re-position right after they switch off , as so not to be a target.
Using the light source on/ off search tactic is a dance within the troop and requires positions to be scouted before this process to begin to avoid getting bogged down, running over own troops, driving into rivers -in the dark.
Granted the crew may have a tank with crew night viewing devices to make this possible, others depending on time-frame would not.
I would think in the sim this will be difficult to make work as in real life without a human in the AFV supervising this Light on, light off, reposition, repeat sequence.
After all...we still drive into rivers/ buildings, with light,...... oh the fun in the dark...LOL