First time grow, Tips and Advice wanted :)

Hi I have recently set up a grow box that is 3ft High by 2X2 square. Made out of sheet metal. Inside the box are 6 CFL each putting out 900 lumins. On the top of the box is a computer fan which is used as an exhaust. And a smaller intake hole at the back covered by a peice of PCV pipe as an intake fan. I have started from seeds. I am roughly about 2.5 weeks into this little project. I will later set up pictures of everything(waiting for camera to charge.) But there a few little questions, firstly. the plants were on a 24/7 light cycle and today are now being switch over to a 18/6. They are sprouted amazingly in the 2 weeks roughly about 10" tall now. After taking a look at them, one seems to be developing little sacks near the base of the leaf(on the stock). I have also began to use All purpose nutrients, watering them down, so i do not shock the plants themselves. Anyways if you have anymore questions please feel free to ask. This is all i can think of right now haha. Will have pictures up withen the hour.

Okay so hear are some pics of the babies:) Hopefully this will give you guys so insight about my setup and plants themselves. I have also just transplanted them into these pots 2 days ago from little tetra pack pots.