Maybe I'm wrong, but they look like they stretched and fell over. Looks like the lights could be a little closer too.
Try propping them back up, and if ya can, move the lights to about 2 inches from the leaves. (keeps 'em from stretching.)
Also, do you have a digital thermometer to keep an eye on the temps?

Are you getting good drainage on the small one's? Might need to transplant them already.