Going into 5th week flowering...leaves curling??

Going into fifth week of flowering and the leaves close to the bud is curling. I am thinking that it is maybe due to the lighting. I moved my lights vertically about a week ago. I added some pictures. Please let me know if you need more info. Thank you guys for the input!!

to much Nitrogen from the look of it, clawing leaf`s in flowering is normally a sure sign, cut down on your veg nuts/N. and up the P/K instead ..

Looks like it could use a lot MORE light to. That thing is going to take forever if it has been 12-12 for 5 weeks already.

5 weeks into flower ? damn add some more light, and if its winter there i would be willing to bet its a temp issue

The leaf curl is the least of your worries, how about giving that thing some light and a cooler room to avoid this stretch. The way its going you'll end up with a pound of stems and not much else. Next grow use HID lighting with cooltubes and an indica.