So, some of the infiltrator ranger ability choices are low-light or darkvision. Are these limited by the time limit for the other powers, or are they just added to you as vision types? I.E. a half elf takes Evil Outsiders and his choice at 3rd level is darkvision, does he have to activate the vision,or is it just always on? I was informed that they were always on, so the camouflage and hide abilities that are now attached while the powers are on doesn't work. This is important for my infiltrator, because having darkvision always active has helped me a lot, especially since cold iron is so expensive to enchant that first step.
I don't think thats how it works. By my reading of it you choose one of the adaptations listed for one of your favorite enemy types, and you can use it for 10min per level but it must be used in 10 min increments. So no, it's not always active. As there are other ways to get dark vision, I wouldn't recommend this.