Nutrients vs lighting

Ok so i just got through my very first grow. i grew 5 plants under 276 watts of CFL lighting under a screen (scrog). End result i still haven't weighed it get but im guessing its only around 2 ounces total. and alot of small nugs.

On to my questions
i was just using a organic soil mix i pulled off of here know as "Vics soil mix" and using water only.

what should give me and better OVERALL result. Better lighting? or better nutrients? if i get into growing with Mh and HPS lighting im gonna need a bigger grow space, ie a grow closet,

whats the minumum size closest i can use a 400w setup?

OR can i add nutrients to my current soil mix?

....anyone?

How big were the plants, and how big is your space? 276w is not much for lighting.

well from the soil to the screen, its 12 inches,im guessing they grew to about 20-24 inches. im working with a 3x3x3 cab


right now i currently have only 1 plant that im going been mainlining outside, i just threw it in there yesterday to flower. i want to try something different, i want to feed it something!

but let me tell you i might have gotten ALOT out of my first grow but potency is THERE!

For the size of your plants I would not think you should expect to much more. Also I think that space would not work w/ a 400w HPS. Bare minimum you would need 10" away from the plant which would mean even smaller harvest. But take what I say w/ a grain of salt because I have not grown anything yet, just been doing research non stop the last two weeks.

If I stick a 400 watter in the ill be cooking plants, I'm wanting to upgrade my equipment. My question was ,whats the smallest size closet I could get away with for a 400w light setup, 2x4,4x4?

I have seen plenty of people using a 600w in a 4x2 it all depends on how much ventilation you are doing. 400w HPS puts out 55,000 lumens and you at least want 5,000 lumens for each square foot, I have read that you get diminishing returns past 10,000 lumens per sqft. With that in mind I would go w/ a 3x3 w/ 6,111 lumens sqft like you are all ready doing but w/ more vertical room for the heating issues, or a 4x2 w/ 6875 lumens sqft. If it were me I would go w/ a 3x3 w/ a 600w but thats what I would do and I am sure you want to use a 400w for a reason.