canoeing leaves, tips turning up and down

[cannabiskid20]

I recently noticed a few of the blade tips were starting to either claw up or down, and then today one of the plants leaves were starting to canoe. I have one plant directly under a 300w *132truewatt* viparspectra led and it isnt really showing any problems other than a little bit of clawing.
I have 3 others that are topped and under a 250w hps and 300w viparspectra for side lighting and all of those 3 are showing the most signs of the clawing, I was thinking possibly a problem with the nitrogen or light stress? but why would they claw upwards, and why would they be canoeing? any info would be greatly appreciated, thank you.

 

[sogitup]

Check your humiditiy.

 

[Antman15]

http://www.growweedeasy.com/heat-light-stress

 

[cannabiskid20]

http://www.growweedeasy.com/heat-light-stress

my heat really isn't bad, I have a thermometer above the canopy that usually reads about 75°f and I have a laser thermometer that I check the fan leaves with and they usually stay about 70°f at night they drop to about 60°f

Check your humiditiy.

i think i have low humidity, I have a humidity gauge in the tent and I can never get it to stay over 45% even with a humidifier, but the humdifier leaves water droplets on the leaves and they dry and leave white spots on the leaves, I also just noticed a couple little brown spots on a couple of the leaves and some of the leaves have a couple little holes, but I don't see any signs of pests at all, what do you think? thank you

 

[Antman15]

Take or leave it, but Raise your lights and/or add more circulation. Good luck.

 

[RetiredGuerilla]

I agree with Antman15. Those fabric pots can have dry pockets too. I went back to plastic.