NL should be big, so only the highest one is somehow on the track. But the real stretch comes after day 25-30. You do not describe much, so it is hard to tell.
I had grown Greenhouse seeds NL and RQS NL, plants were big, 100 cm, very sensitive for my mistakes and smoke was worth nothing at the end in both grows. Really nothing. It had got molded after time and I was happy to throw the remain away. Together with NL plants, Think Different (Dutch Passion) and Royal Critical (RQS) had been grown, both rewarded me with nicely smokable buds even when my growing was everything but good. Of all 4 strains grown together, TD was the winner, and Northern Light was not worth growing.
I am afraid it does not sound good for you, but that was my experience with 6 NLs of 2 different seed banks. If that was only one plant, I would say that I had screwed something, which I really had, or bad pheno, but 6 plants (they had yielded 30-50g per plant, but buds were no worth, just had no smell, no potency, nothing). And both times there was another strain besides in same environment doing much better.
Good Luck!