Fast plants are usualy MALES, but not always.
If your seeds are from the same plant , that should be a starting ,base line. Light should be about 2-3 inches above the plant.
Note with cpf you will need to change them out often as the lummend drops like a democrat pants at a conventioin.
Try moving them around the box to prove which bulbs are doing the job. Now with red the plants will grow faster but longer internode distance cause they are reaching for the sky.
Take a plant of the light and for the first few days it grows like hell to a small light, then dies.
Ah the smell of growing pot in a house, gives it that homie feeling. till they start blooming.
Note it takes about 35 watts per sq ft. so you need atleaset 4-6 more bulbs in that space.
I usualy get bloomers 36...2.5 ft tall with with 360 watts of full service bulbs and ballast 4 footers.