leaves getting yellow spots and curling like a taco... (PICS) Please Help me

Hi ya'll!
Here are a few pics of my plants, the grow room, and the problems... I am using a 100W HPS from the side and they are sitting under 2x40W eco-lux and 2x20W Eco-lux flouros.... The temp is about 80 and the humidity stays between 50-60%
Ok, the plant in question suddenly showed these weird sympots yesterday and seem to be getting worse. They are yelloying from the middle of the leaf out and beginning to show little brown spots in the middle of that... I am showing no signs af any insects either. I gave two of the plants (including this one) nutes for the first time about five days ago and noticed this when I was going to water again yesterday. Just in case it was nute burn of some kind, I flushed it. The ph of the soil is about 6.5 I was wondering if this could be a burn from the lights? I enclosed a photo of thr room as well so you can see the distance in the light from the top of the plant.... This one was my best grower. As you can see in the photos, some of the leaves are curling in on themselves and turning in odd directions....
Anybody help???
I just repotted them into these4x6 in pots about 3 weeks ago... the grew very fast from then...
I am just hoping to keep these girls happy as it is my first attempt and I have been putting a lot of time into them and we have endured a lot....
thanks in advance guys

the same thing has happend to my plant it started on the bottom and is working its way up to the top:( after reading up on it i think it might be shortage of N but can someone verify that?

i have given them nute with N within the past week as well as my other three. This is the only one having such an issue. I don't think that lack of N would be the issue. I could be very wrong but afraid it isn't so. this began on the top of my plants and not the bottoms. the leaves that are right under these tops on although are beginning to wilt as well... I have no idea...
rootbound? I just repotted these a couple weeks ago...can the roots grow so quickly??
any more advice would sure help... BTW these plants cam from seeds in the plant located in my avatar pic... supposed to be lowryders??? I was told to give them light 24/0 until mature because they would begin to flower within the light due to the strain anyway... is this true??
thanks guys

what kinda soil are you using,what kinda nutes arew you using,and how much did you feed them?did you add dolomite lime to your soil?also, how often do you water?

i am using miracle grow soil with a bit of perlite... I have not added dolime... what is it used for? this is my first attempt at growing so I am new to this. I water every 3-4 days. Depending on how long it takes to dry... could it be too much light?

oh the nutes are a 10-10-10 but I ususally dilute it a lot just to give it a touch of nutes... The other plants are doing well and recieve exactly the same treatment. also as I said, I can see no signs of insect infestation....

OK guys I totally found out what it was!!! So I thought I would share to help anyone else if they are having the same problem... I was going to re-pot it and flush it just to make sure it wasn't a nute issue and low and behold.... it was Rootbound for sure. Wow, that grew fast.... I just put them into those pots less than tree weeks ago from seedlings.. so i repot, and gave it and the soil a good dousing and placed them back under the lights to continue... hopefully by morning, they will look better. I am going to repot all of them but have to get two new pots tomorrow... I will keep you updated!!
thanks for everything!!!

I just had a similar problem with the leaves curling up like yours. Found out yesterday that mine were root bound as well. I went to transplant them and the roots went beyond the soil and into the 1/2 inch of gravel I had. It sure doesn't take long for that to happen. I think next time I am going to start out in a larger pot. Happy growing.

yeah me as well. Larger pots are the way to go...
I also have another question to anyone else.... my dog happened to get into my grow room as I was watering... I turned my back for a second and she bit off/broke off most of one of my plants.... will the rest of it usually survive? there are about two sets of leaves left on it....