Maybe I was a bit confused when I made my first post. Are you saying that the plants are ten days old, as in ten days from the moment they broke the soil; or are we talking about ten days from when you moved the seedlings under the brighter lights?

In ten day's time I have had plants grow a good 6 inches and already start to branch out, although I don't move the seedlings out of the propigation dome until they have their first set of true leaves.

Although, ten days from the moment that the seedling breaks the surface I would expect to see... not much really.

So yeah, what the guys above me said.