Hi BOY..

congrats on the new set up.. should be fun

people arond here are helpful...
pics are always helpful

I am guessing you are starting from seed?
you can switch to HPS 10-14 days after sprout.. start with your HPS light 24+ inches above your plant and slowly start to lower it.. about 1-2 inches a day..

you will need to draw the heat from your HPS away from the plant and the bulb... this way you can bring the HPS close to your canopy... the closer the light to your plants the bigger the buds.. this will make a BIG difference in the weight of your yield

this can be done by pointing a fan at the light and having it blowing the heat straight to the ceiling..

your life will be 1000times easier if you can draw heat out of your closet... .. that hps is gonna heat that closet up to 90+ degrees...

4 plants in 3-5 gallon buckets is good for a first grow..

keeo us posted

: )