Is this a nitrogen deficiency?

Afghan auto on day 31, I haven't gave it nitrogen nutes yet so I'm guessing its that, just want to make sure.

And it did get a little light burn on other leaves but I already fixed that and moved my led further away and and halted the drying out of the leaves and browning them. all new growth on main cola doesn't have light green on it just the leaves with the shoots

Top of plant

If it was nitrogen the older fan leaves would yellow and I don't see that.
That top looks good, I wouldn't change anything!
I would remove the damaged lower growth to give more nutes to the top.
It's not going to be much anyway.