The girl looks very fine to me BUT it honestly doesnt look like Northern Lights. I have grown NL many a time and it is a mostly Indica strain. Your plant has pencil thin leaves which is a Sativa. Indica leaves are dark green and very broad. You mention that you have around 30 bud sites. I would say all are about 1" from each other which means the plant is at least 30" long. Almost all Indicas I have grown wouldnt reach 30" in the full life cycle never in the 2nd or 3rd week of flowering which also shows a sativa strain. You sure this wasnt just a bagseed from some weed you bought. If you were told they were NL then I think you were dupped, hope the seeds were free. Anyways just grow them to get the max buds, Good Luck...Peace MrP.