Yes, I think.
I think it's like reducing their field view. If they can see you 100 hexes unsneaked, they will see you in 50 hexes sneaked in front, so basic tactics and speed (Silent Running perk) still apply, as well as avoid facing their front FOVs and especially snipers with high PE....Raise it to the 300% before you can take Ghost perk. Then, take it multiple times. It's safer.Ah, btw, is a mine interieur considered technically a 'poor lighted area?'