And fluo lights should be about an inch away from the tops of the plant. If your using strip lights the middle 1 foot or 2 foot, what ever it is, is the warm spot and the best place for the plant. Try and get the lights as close as possible without burning the leaves.

Get a fan on them. This'll strngthern the stems. The stretching wont matter later on, as long as the stems are strong.

And try and get as many watts of blue/white spectrum, or "cool" bulbs as you can.