I use a 600w digital for veg that way you can use mh or hps and adjust wattage, I put it at 300 for 1 week, then 450 for 1-2 then it's flower time. I keep my clones under 6400k or 6500k cfl until about 6-8 inches tall for Indicas, 10-14" for sativa usually topping both once, they blow up once transplanted into 2-3 gallons and placed under 600-1000w HID. I time the "blow-up" by how fast the stem becomes "woody" looking where it meets the soil, the sativas are always faster to that point.
Can you spot Berner & the cookie jar? http://www.youtube.com/watch?v=4o41JGN-Igs
this is terrible