hi peeps, im new here, sorry to hijack this thred but my questions are along the same lines and i have no idea how to use this forum!!
this is my 1st grow and im using a 2x2 foot space with headroom (a closet) and a 150W hps/mh (i can run both with this ballast)
this grow im using "bagseeds" but have some autos on the way.
my questions are basically
#1...... do i have enough light?
my hps says 16000 lumens.
#2.......the 2 plants have between 5-8 nodes each and are 6-8 inches tall, i want to put them into flowering now but i would just like to know if waiting till they are 12 inches make much diference to quantity or quality? I mean if i flower now, will i finaly yield much less than waiting a few inches?

also if i do flower now at 6-8 inches under a 150W hps in a 2x2 space can you guess at how much it will yield??? i have no idea, this is prob the biggest light i can afford to run at the mo and i just upgraded from cfls during veg and am seein MASSIVE improvments....cfl's dont seem to have the same punch to them as mh, although i do rate them alot.

thanx to any kind people for answering a noobs questions and sorry again for hijacking this thred, maybe a mod can move this for me!!