Yellowing leaves, would love some help!

So this problem started going on about 2 days ago, I figured maybe it was because she needed nutes, but that wasn't the case. My setup is 3 28w daylight CFL's and 1 softwhite 28w CFL, and I'm using soil. I just started weening it onto nutes, but it hasn't done anything so far. Could it be heat damage at all? Thanks!

Anyone out there?

its not heat damage, not hot enough under CFL, looks like over fert.Flush the pots, No nutes for 10 days only watering when neccesary ,then half strength for couple weeks, then full str as plants get in full veg stage.

So I flushed the pot, and I bought some Y splitters, so I have the entire plant enshrouded in CFL's and it's beginning to have only healthy foliage now. The tips, however, are still growing in with a tiny brown tip. Isn't that a nutrient deficiency?

iS that miracle grow soil?

Yeah haha. I've been waiting for peat moss in the mail... it's been over a month. I'm planning on transplanting into the P.M. next pot switch. So I flushed and gave it a few days then started using a small amount of nutes and it helped a bit, but now it still has the brown tips on the leaves. Could it be because the PH is like 7.5-7.8 and nutrients are getting locked out?