My DIY 4xQB120 Flowering Light

Also, how are the plants doing ?

CoB_nUt said:

I like your temporary hang suggestion. I'll go that route. Design the frame around it. Thanks.
About mapping it out with a cheap lux meter, any brand or 1 in particular you advise?

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I can't recall the name of the meter that I've seen recommended here most often, but I know @Randomblame has suggested a $15 eBay meter a few times (perhaps he can provide a link?). Alternatively, Amazon has a wide selection at various price points. Some have detachable sensors for more flexibility in taking measurements, but I expect anything that goes to 100,000 lux will do (unless it has consistently abysmal reviews). I think mine is the Leaton brand.

CoB_nUt said:

Also, how are the plants doing ?

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Just recently harvested Tent 1. It was a great run until I had a dehumidifier issue and lost a good portion of the harvest to budrot! Got that shit sorted and looking forward to moving the next batch of plants in from the veg space as soon as the last of the good stuff is done drying and out of the tent. Tent 2 is in a holding pattern at the moment, until I decide what new beans I'm going to pop - planning to do that run under the 120s from germination to harvest. I usually germinate under CFL in a separate area, then move to another small veg area under a single QB288, and then move into one of the tents and under the 120s; I figured I might as well see how it goes under the 120s from cradle to grave.

Great, I will be following if you journal the cradle to the grave grow with the qb120's

I'm using this one, pretty cheap and it can measure up to 200klx. It says high precise but I've done PAR measurings (my friend has a PAR meter) and the converted numbers from lux were ~10-15% lower than the actual PAR readings.
Since then I add 10% in addition to the converted numbers to get closer to the actual values.
But that only applies to this device and even an identical could spit out different numbers! The thing is a cheap one...

https://www.ebay.com/itm/Hochpraziser-200-000-Lux-Digitaler-Lichtmesser-Tester-Photometer-Luxmeter-HS1010/401579659115?hash=item5d80034f6b:g:Wl8AAOSwmodbbQrD

Thank you @Randomblame

I like this build. It's cheaper than the 2 panel 260 V2. But can you do a full grow under this set up.

Anthraxas said:

I like this build. It's cheaper than the 2 panel 260 V2. But can you do a full grow under this set up.

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Yes, 3000k is great for both veg and flower.

Would you still reccomend your setup and if so would you suggest any small changes. I have been reading a lot and I think I would be able to do everything I need to with your design. But before I start ordering things I would like to know your thoughts.

Anthraxas said:

Would you still reccomend your setup and if so would you suggest any small changes. I have been reading a lot and I think I would be able to do everything I need to with your design. But before I start ordering things I would like to know your thoughts.

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I would absolutely recommend my setup. I liked it well enough to build a second, identical fixture. I would, however, design it slightly differently if I were doing it today - I would widen the frame to spread the boards out a little bit more to get better coverage on the sides of the tent. Also, I would opt for the HLG-240H-24A CC/CV driver (wired in parallel) instead of the HLG-240H-C2100A CC driver (wired in series). This is all pertaining to my space though. If I recall correctly, you're working with a 3x3? In that case, I would opt for four QB132s on an HLG-320H-36A, and just keep the driver around 300w once you're well into flower. Doing this would give you more headroom for a space that's slightly larger than mine.

what's the benefit in switching from series to parallel?

Lower voltage?

kotobide said:

what's the benefit in switching from series to parallel?

Lower voltage?

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Lower voltage and more versatility.

Well as soon as they become available again I'll be buying the setup. Thanks for the advice.

How's the recent grow going.

Anthraxas said:

Well as soon as they become available again I'll be buying the setup. Thanks for the advice.

How's the recent grow going.

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As usual, I over-vegged the plants (due to space and time constraints), and controlling the environment in an unfinished Michigan basement is a constant struggle, but all things considered, it's going well!

Humple said:

As usual, I over-vegged the plants (due to space and time constraints), and controlling the environment in an unfinished Michigan basement is a constant struggle, but all things considered, it's going well!

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Yeah I'll be setting up in michigan as well. Something tells me I'll be going through the same issues.

Hope you get some good full flowers.

What's are your guys' thoughts on this type of layout?

Thinkng about either QB120 or QB132, what your opinions???

Ok so I tried a few different layouts, South Park style lol, feels like I made an SAT question lol which one goes next?? Haha

Every square of graph paper = (2in)^2, and I'm working with a 4' × 4' area. Panels are 11" × 9.50" per @Humple measurements. Which one is the weiner??

1 (original)...


2 (rotate panels 90°)...


3 (corner panels inverted from rest)...


4 (short sides middle perimeter)...


5...


6 (short & long sides middle perimeter)...


7 (only 7 panels)...


Ok I'm just really baked and fucking off now haha..

8..


9...


10...

ChiefRunningPhist said:

Ok so I tried a few different layouts, South Park style lol, feels like I made an SAT question lol which one goes next?? Haha

Every square of graph paper = (2in)^2, and I'm working with a 4' × 4' area. Panels are 11" × 9.50" per @Humple measurements. Which one is the weiner??

1 (original)...
View attachment 4255997

2 (rotate panels 90°)...
View attachment 4255992

3 (corner panels inverted from rest)...
View attachment 4255994

4 (short sides middle perimeter)...
View attachment 4255995

5...
View attachment 4255999

6 (short & long sides middle perimeter)...
View attachment 4255998

7 (only 7 panels)...
View attachment 4256019

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Just get 9 boards.......?
Anyone got a par map, lux map of a single qb 120, qb 132 board?
That would help determine the best spread.

Moflow said:

Just get 9 boards.......?
Anyone got a par map, lux map of a single qb 120, qb 132 board?
That would help determine the best spread.

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Lol Dammit

Well there's always that option..

And ya also didn't think about referring a lux map, haha

But arts and crafts was sure fun

ChiefRunningPhist said:

Lol Dammit

Well there's always that option..

And ya also didn't think about referring a lux map, haha

But arts and crafts was sure fun

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It's like playing chess.....

Lots of moves for the same result lol