DIY with Quantum Boards

Pineapple Chunk at 10 O'Clock, Pepper Plant at 1 O'Clock, Purple Afghan Kush at 4 o'clock, and Power Grape at 7 o'clock. Under 4x QB288 in parallel with a HLG-480H-54A driver. 2x 4000K, 1x 3000K, 1x 2700K. They are all about 30 days into flower.

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Pineapple Chunk
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Purple Afghan Kush
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What layout would you guys recommend for a 320 watt 3 qb288 kit along with 4 of the qb120 at 240 watts? This is for a 30x48 tent. I know it may be overkill but I can dim down as needed. I just want excellent coverage.

I was thinking of a 28x36 frame with the 320 watt kit running down the middle and the 4 qb120 at each corner.
 
WDENL5 said:
What layout would you guys recommend for a 320 watt 3 qb288 kit along with 4 of the qb120 at 240 watts? This is for a 30x48 tent. I know it may be overkill but I can dim down as needed. I just want excellent coverage.

I was thinking of a 28x36 frame with the 320 watt kit running down the middle and the 4 qb120 at each corner.
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this is my 4x qb288 setup. it measures 27.5x30", it'd fit right in there. I use an hlg-480h-54A for 4 boards in parallel

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Black Thumb said:
@Stephenj37826 @robincnn On the website Only lets you buy 2 or 8 boards ?

Cant buy 1 or 9 or 3 or 7 ?


QB-288
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They are packaged in boxes of 2 to protect the boards better during shipping. 2 inside a box then boxed for shipment. Most people buy even numbers generally.

Sorry for the inconvenience.

We can do odd numbers but the system we set up for much quicker turn arounds is multiples of 2.
 
robincnn said:
Post 2 on this thread. I tried the same heatsink and it got hot. Fins too close and it did not help much with cooling.
4 qb 288's @ 1400ma is the most you can do with that heatsink before it gets hot.
https://www.rollitup.org/t/diy-with-quantum-boards.927159/#post-13147205

If you can hold it for 3 seconds then you are fine. you are probably near 55-60C
email HLG if you need heatsink. I will try to help.
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Thanks. I'll try and get some more direct airflow over them. I wish I could buy all new heatsinks from you guys. If I spend another 100$ on heatsinks I could've just bought the thing pre-built.
 
WDENL5 said:
What layout would you guys recommend for a 320 watt 3 qb288 kit along with 4 of the qb120 at 240 watts? This is for a 30x48 tent. I know it may be overkill but I can dim down as needed. I just want excellent coverage.

I was thinking of a 28x36 frame with the 320 watt kit running down the middle and the 4 qb120 at each corner.
Click to expand...
So just slightly larger than a 2'x4'? You'll have excellent coverage with the three 288s. I can't think of a good reason to cram four 120s in as well. And I'm not sure how you'd fit them into that space - seems pretty tight. Maybe if you ran them vertical, as side-lighting, but why use the extra electricity? Those 288s will penetrate like a motherfucker. You'd get way more bud for your watts if you just used the 120s for a second, separate grow space.
 
Humple said:
So just slightly larger than a 2'x4'? You'll have excellent coverage with the three 288s. I can't think of a good reason to cram four 120s in as well. And I'm not sure how you'd fit them into that space - seems pretty tight. Maybe if you ran them vertical, as side-lighting, but why use the extra electricity? Those 288s will penetrate like a motherfucker. You'd get way more bud for your watts if you just used the 120s for a second, separate grow space.
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What size space do you think I could flower with the 4 120s? I have another tent the same size and a 30x30 that I am vegging with now. I could veg in the extra tent and flower in the existing veg tent
 
Humple said:
A 30"x30" tent would be perfect for four QB120s. Run them on a Meanwell HLG-240H-C2100A and you'll max out at more than 250w at the wall.
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Pretty much what im running save for a bigger driver so I can add two more but shit I may not need another two for this space lol.

These plants are a few weeks into flower had to swap tents so now there 1st day under the four 120 boards to finish the remainder of flowering. I love my Cree build but these boards have such a great spread!

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We normally use 3 240W cob rigs on about the same space 5x4 (our beds are long and about 4" wide, with a light every half meter)
If you don;t have a PAR meter you will need to use math to get the balance right. Don't be fooled by what seems bright to your eyes.
 
ANC said:
We normally use 3 240W cob rigs on about the same space 5x4 (our beds are long and about 4" wide, with a light every half meter)
If you don;t have a PAR meter you will need to use math to get the balance right. Don't be fooled by what seems bright to your eyes.
Click to expand...
Pretty big difference between a 4x5 and a 2.5x2.5, though. A single 250w fixture in a 2.5x2.5 would give 40w per square foot; 720w in a 4x5 is 36w per square foot.
 
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