Those outer ones are screaming for light. Uhh huhh, see, I can hear them: "Light, light, I need light!" lol

Seriously, they do look a little stretched. You may want to go ahead and add in your other light so you can distribute the light over that further distance you need. You would have seen that stretching DRAMATICALLY if you have ever used flourescent lamps. I kept my lamp a little too far away, and my baby is over a foot tall at 4 weeks!

Attached is a picture of my 2 babies, started at the same exact time...The little one is a polyploid (mutated)...I think maybe it's because the seed was a little immature, iono....but see the difference in height? I learned my lesson about that weak ass flourescent bulb. (Also, the little one was stunted a little bit because I transplanted it from a cup to that pot.)