I think you need to move the light even closer when you replace it.

They are already stretching.

MH cannot hold a candle to CFL for this stage of their life.

I can see the stretching. I would lower the bulb a bit more. With a good fan RIGHT ON the bulb, blowing UP, you can get the bulbs within 4 inches of the plants.

Assuming it isnt a 1000Watts and has a hood or reflector put on it.

Good luck beautiful lady