Too much light maybe? Pics

I took the leap into LED lighting and so far so good, but I have a small problem that I'm sure someone can help me with. The problem is that the leaves started curling up. Let me give a little info on the grow.
These 2 plants are random seeds from Nirvana. The 3rd one is AK48 and just sprouted (not planted yet).
1- Lights - two - 300 watt full spectrum LED lights that are 2 feet from the plants. I think it may be too much.
2 - pH = 5.8. ppm = 200 using BureBlendPro veg nutes.
3 - DWC
4- 10 days from planting .
5 - Opened up the grow to let the A/C blow most of the day. Temps seems to stay the same. Lights run fairly cool and I have a fan blowing 24/7 in there.

The only thing I can think of is that there is too much light. Maybe an LED grower can help me out a bit.

what are your temps? you say they stay the same? I grow only with LEDs and typically when they are curling up its typically either too close to the light or heat, your 24" away so I'd say heat but I don't know your temps

I'm running a 600W BML Spyder over top about 12" away and a 500W Blackstar Flowering for side lighting, so I think the too much light thing might not be it

I don't have a thermometer in there, but I can put half my body in and it feels cool. I put my hand under the light and it feels cool as well. I have an extra fan I can throw in there. Maybe I'll hang it above the plants. The lights are on 24/7 if that matters with LED. I wouldn't think so. Could the pH down I used have something to do with it? My tap water has kind of a high pH and I had to lower it a little.

It does look like heat though.

Too much light for such a small plant. Switch to CFL's untill it gets a bit bigger. Seedlings can't stand intense light for 18 hours a day.

I raised the lights and I may turn one of the lights off for a while. Should have started with cfl's. Learn something with every grow. At least this isn't a big problem though. Can't afford to put cfl's in now, I spent all I can until I get a couple more paychecks.
Sorry about the dumb question. I guess I worry too much. But I do have a good question. Are the freebie seeds that you get from Nirvana any good? I've had a lot of head injuries and weed helps with the constant migraines. Not sure if the free seeds are good medicinally or if I should save for more expensive seeds.

If you want strain specifics you have to buy them.
Any random seed could really be anything.
Im sure that whatever it is will probably help your headaches but its honestly impossible to know what u got unless u buy em.

As for the cfls...if u have a dollar store in your area try looking there they have cheap cfl bulbs and will only cost a couple bucks and an old lamp from the house.

Good luck with your grow.

I've never actually been in a dollar store. I'll have to check that out. Thanks everyone. I'll leave one more picture. My AK48 is ready to be put in a bucket next to the others.

i think its heat stressed a little bit

I've noticed a lot of my smaller plants can't handle the LED Sometimes. They produce a lot of light and it could be light stress if you feel your temps are low. Personally I like to veg outdoor for small ones though