Here are some pics of my plants 4 weeks into veg. under 8 26 w 6500K cfls. There about 8" tall with 10 sets of nodes. Grown in Scotts premium potting soil cut with 30% perlite. I had some yellowing on my leaves 3 weeks in as you can see from some of the pics. Does anyone have any input as to what this is? I though N def. so i watered with 1 parts urine diluted with 10 parts water and unfortunately i burned my plants slightly, so i had to flush them. The burning wasnt too bad but my lower leaves are still yellowing so im not sure it was a N def. Any thoughts?

Cant seem to get the pics to post on the thread but u can still see them in my photo album.... sorry