I think you really need to consider the stretching issue. I mean, it all depends on what you're going for, but if you got those lights closer you could really curb some of your upward growth.

My plants are about 9 days old, and are MUCH shorter than yours. That said, I think not putting the energy into growing upward must allow them to put that energy into growing outward and getting new leafs and what not. Just something to consider. Link to mine is in the sig if you want to take a look at what I mean, mine are like...2 inches tall. But already have, 10 leafs. Just a thought.