How long should I leave under the fluorescent?

I will be ordering a digital ballast & 600w MH/HPS on the 15th and was wondering how long I can leave the seedlings under the fluorescent.

Marijuana Growing - DfyAnt's Album: Day 3 -- DWC & Soil / Master K & CH9 Mixed (Feminized)

Thanks for the feedback.

For as long as you wish.

yeah up to 24 hours for the veg stage

I think he might have meant how many days, before bringin out the big ass watts

Your plants are already too tall. Put the fluoros as close to the leaves as possible and change over to MH as soon as they have two sets of leaves. Don't put the MH too close to the plants or they will burn. When you can hold your hand on top of the plants and not get burned you're in the right place.

When the plants first popped above the rockwool I had the light right on it, raising when needed. My grow tent is 4ft x 4ft x 6.5ft and will keep the MH 1-2ft away raising when needed.

Right now I have the fluorescent on 24 hours with an oscillating fan gently blowing the plants to make them strong.

For the ones Im going to plant in soil, I was thinking about 3 gallon buckets. What soil do you guys think I should use, Ocean Farm?

Thanks again