Instinct 2x - red vs green led - what's the logic.

As per subject - what is the rationale between red and green led's on no tactical/tactical.

Red typically allows to see things in the dark without eye strain - e.g. you can use it to see around you without waking anyone up.

Green on the other hand - I have no clue why you'd want to have it. What's more the night vision option, which is exclusive to tactical, disables heart rate sensor which is green, so it makes even less sense to have another green led there.

Help homie understand this conundrum.