The Argo missions don't allow NVG's unfortunately.
When the Argo missions first came out, I was able to play through and the lights worked. Now I can't get through this mission because the light doesn't work for me at all. I switch to the outside view to ensure it is pointing in the right direction but nothing ever illuminates on the ground. Only the landing light shows. But it is only good within a few feet of the ground.
This mission is pretty difficult without light. You're in a valley between mountains with trees, power lines, and buildings. But pretty much the only thing giving you ground reference is the cars on the road.