Well, I grow 1 plant per light to produce a pound a plant. For 30, a min. of 12,000-15,000 watts will be needed to produce that little amount. Why not drop your plant count and produce bigger yeilding plants???
well see outcome thx for your opinons everyone except that retard.
When you're ready to do what amounts to a small/mid sized commercial grow you'll know how much lighting you'll need, how to maintain your plants, etc. Starting off with that size of a grow with negligible experience is a recipe for disaster.
The fact that you already have 30 plants going, but don't know what sort of setup you want to put them in, means, at the very least, that you didn't quite think things all the way through here!
Not to be too mean about this, but the FIRST thing you do is setup and equip your grow room correctly. There is a lot more to it than just plugging in a whole bunch of lights. There are electrical safety issues, cooling, ventilation, potentially light movers, humidity, odor control, etc. These things aren't "rocket science", but they're absolutely critical to a successful grow. You do these things BEFORE you start sticking plants in 5 gallon buckets.
But to answer your question, as a first approximation, figure if you're a competent experienced grower, you can pull maybe 0.75 grams/watt with the right strains. So your 15lb target equals about 6800 grams, meaning you'd need roughly 9000 Watts to get there. If you're a top level experienced pro grower, AND you use the right strains, once you get everything perfectly dialed in, you might be able to do it with only 7000 watts of lighting. Note that these figures exclude other necessary energy consumption from cooling, fans, timers, security, water pumps, etc.
Now though it "could" be done with that little juice, it this actually applied to you, you wouldn't be asking the question.
As a novice, you'd be lucky to pull 15 lbs with 13000 watts of lighting.
My polite suggestion to you is to start smaller. Once you have 3-4 crops worth of experience growing only a few plants and strains at a time, THEN you might be ready to move to gigantic kilowatt commercial sized grows, but not before.
If you grew 4 ounces under 150W, then to grow 15 lbs will take you 9000 watts.
Interestingly, that's exactly the number I quoted in my post above.
But the important thing to realize here is that a 9000W grow operation is a different "animal" than a 150W one. There are a lot more design and setup issues you need to consider before you can get a grow of that size going.
I, also, was not expecting my plants to be this big... I have 5 under a 1000W and there's not much room... My suggestion (I don't have much experience - but still) would be to do a perpetual grow on the strains you have, picking the best to clone along the way, maybe 15 at first with three 1000W's, picking the best to clone and maybe even scrapping a few strains along the way. Then with the next one, do the clones and the next 10 pre-started seedlings for maybe 5 clones + 10 new strains. Then you'll keep 15 plants under there at a time, find your strains you like, and have a (somewhat) perpetual grow going on. Maybe start seedlings when you take clones? Then the seedlings would be ~2 weeks behind. Just my two cents.
thx for your input everyone, well see were this takes its self. Has anyone ever used genoratores to grow and would that be more expensive then electricity?
Grid power will always be your cheapest option. If you need to be stealth then generators are an option. There are propane/natural gas ones and diesel ones. Your application would determine the type.