Hey yall I just set up a 4x4x7 tent for vegative growth for 9 autoflowers. I've been looking at a 480w QB from shenzen meiju but am not sure exactly what to pick. These plants will be in the tent for about 40 days before going into the flowering tent to finish they're last 40ish days. Any advice is much appreciated thanks!
What size/brand quantam board for a 4x4 veg tent?
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bernie344
Well-Known Member
I have a kingbrite qb480 and another which I got from DHGate sunrise Led QB480, this one is a better build with all wires neatly tucked away, looks identical to an sf but much cheaper.
Great in veg
GBAUTO
Well-Known Member
I run a Meiju 480w fixture in my pheno tent that's the same size as yours.
I opted for the 3500k w/660's and it does a great job.
I've been using it for a couple of years now and it's been flawless.
I've been using it for a couple of years now and it's been flawless.
Moabfighter
Well-Known Member
Get 4 qb96
bernie344
Well-Known Member
Why?
PJ Diaz
Well-Known Member
6 is even better
Moabfighter
Well-Known Member
Because on a 320h driver you can run two together and push them to almost 160 watts each. They crank out the light and are about as big as your phone screen.
bernie344
Well-Known Member
Thats pretty good.
Southernontariogrower
Well-Known Member
If you have Meanwell driver they are underrated, 320 is 350 watts and so on. They do that so they last ten years plus. Underdriving I believe its called. For a 4x4 flower the going wattage is at least 600w and up for flowering. I have commercial spider type 600w in 4x4 and its banging. Check out Pacific light concepts or Rapid, Timber for diy that aren't really diy. Might be cheaper than Japanese lights in the long run. Cobs are a good way to go as you can add on more at anytime. Optic led is good too but a little more expensive. HLG is reputable also. Qb 288 boards look awesome. Good luck
PJ Diaz
Well-Known Member
Yep, I can hit close to 600watts with two 240H-54A drivers cranked to max, using QB96's.
If a 600w HPS covers a 4x4 what's the point switching to LED if you need the same amount of power?
Rurumo
Well-Known Member
you'll have to do some research into ppfd-it might be the same watts, but different umols and spread throughout the canopy. I'm happy with a 630 cmh for now, but I can see the massive benefits of these new LEDs.
GBAUTO
Well-Known Member
From a 'heat' standpoint, they are the same-watt for watt.
From a photon output, that's where there is a marked difference.
PJ Diaz
Well-Known Member
600w barely covers a 4x4, largely because of the single point light source, so you have lots of light in the center and low levels on the perimeter. I get better light from 480watts of LED spread out in a 4x4 than I do with 600w HPS. The only thing the HPS can do better is throw out that IR heat, which I need 2 months of the year.
PJ Diaz
Well-Known Member
Yes and no. While I understand what you're saying, my plant's leaves are several degrees warmer under HPS compared to LED, due to the radiant heat being thrown at them from the HPS.
V256.420
Well-Known Member
You gotta love those "hrmmmm well yes and no" guys. Can't pick one side so they pick both
PJ Diaz
Well-Known Member
Because there is a difference between mathematical BTU formulas and physical reality of heat dispersion which needs to be taken into account.You gotta love those "hrmmmm well yes and no" guys. Can't pick one side so they pick both
V256.420
Well-Known Member
but but but I don't live in a physical reality. I float. We all float down here
PJ Diaz
Well-Known Member
Enlighteningbut but but I don't live in a physical reality. I float. We all float down here