In about a week to ten days you'll be wanting to swap them out for some 2600K ish bulbs.
2 ft. heigth? Is that total grow heigth, or does it need to include the pot & light?
Either way, you should consider taking steps to make it squart as much as possible. FIM, Supertop, LSTin, they're your friends on this.
They seem to start out slow. Probably building a root system. That's good. About the 3rd or 4th week she should make you run to catch up.
For what it's worth My cab has 30" heigth. After lights / pot I've 16" grow height.
4 CFLs overhead and 2 sides added later.
and now;