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I think that if you're able to run 3 600's you'll be a bit more efficient. It really depends on the size of your room not the number of plants though. Will you be using co2? That will play a major role in the decision to, since your plants can't use more that ~40w sqft with co2 levels below...

How are you set for electricity? You'll need separate circuits for the light and ac. Sealed rooms do have some advantages, but you should consider a hybrid where there is an exhaust in place to evac/scrub the air when it leaves optimal ranges. Once it's back to set range the room returns to...

Had some time to think about this a bit more while I was driving the zamboni haha....here is how I would set up the tent. Instead of running it 100% sealed, set up an exhaust system to that will run when temps get to high. This will prevent the need for an ac in the tent. If heat is an issue...

I doubt you'll need that ac unit if you're running only 1000w, supplementing co2 and cooling the light with 700cfm....it may come in handy in the summer of you aren't in a basement...As for yield, I'm my 5x5 tent with 1200w and co2 I run 20-25 2 gallon buckets and yield 2-3 lbs per cycles...

400w is slot for 5sqft...at that kind of light density youll need to supplement co2 to use all the light...if you go with 400 you will have to air cool the hood and have sufficient exhaust in place. Get a dimmable 400w ballast if youve got the extra few bucks for one. Then you have options if it...

A typical 1000w ballast draws 1100 watts, while a 600w ballast draws about 680. Basically yea you can use that of you want to cover more space with one ballast, but it's not going to power the bulbs to their potential so you won't see any benefit in light output using 2x600 over the single 1000...

Im running two 600's in my 5x5 dr150 tent. Using super sun 2 reflectors side by side, venting straight thru. I just used metal ducting t's and 90's to connect the hoods. Vortex 6" cooling them, but its speed control is set on low. I recently only fired up one of my ballast to check out the...

Outdoor I have always used granular time realease fertilizers as a soil ammendment, adding more on the topsoil when its needed. I used Organicare Pure grow & bloom this season with decent results this season. Next year I may try Advanced Nutrients heavy harvest, but havent really heard much...

I grew out 3 in a SCROG under 800w. Vegged 8 weeks, chopped them at 8 weeks yielded 8.5oz all together. There were all sharing a 30 gallon tote.

I agree with everyone who has been saying the MV is useless. No reason the HPS wont veg 4 plants on its own but if you want to supplement the hps use 6500k CFLs but cut the MV outta the picture. As far as photoperiod, there is really no reason to run 24/0. At 24/0 plants will not develop as...

I had that same shit happen to me. Ordered 5 feminized MK & 5 feminized mixed seeds, vegged 6 weeks and started to flower. I didnt get any male preflowers, but 2 weeks into flower balls started showing up on the mixed seeds, and by week 4 they were all confirmed hermies....not a single hermie...

Yet another praise comin your way. Great grow.