They look pretty healthy all in all except for the stretching. Like said before, keep your lights closer, as close as you can without burning the leaves (if you're using CFL's or fluoros, you can position them usually an inch away unless they are very high wattage).

Looks like you have some different phenotypes from here, some will finish earlier than others, they will have different highs, etc.. They might all have the same parents, or maybe they all have different dad's, who knows. It's typical to get different phenotypes even with name-brand genetics.

Check out the Indoor Lighting section here in the forums, there are stickies (threads) at the top like "El Cheapo Guide to Lighting" which I think will help you a lot...

Happy growing :jointsmile: