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For a budget build that will work in that space I have always liked @Humple s build https://www.rollitup.org/t/my-diy-4xqb120-flowering-light.950325/

I use a v1 260 watt quantum board kit and a couple atreum 144.2 boards run on a HLG-120H-36A driver in my 3x4 that I really only use as a 3x3. That really.lights the space nicely. https://horticulturelightinggroup.com https://atreumlighting.com assembling these lights are fairly easy

Optic lights are really re branded Sunplusled lights so you might as well get the cheaper branded versions http://www.sunplusled.com/280-2/ I would skip them epistar using diodes completely

Im just starting my second run with them and it was a learning experience the first round i could tell i was stressing the plants on occasion by pushing them to close.to the canopy and had to back off some till they hardened up some.

I use the v1 260 watt kit in my 3x4 space. I don't have a potentiometer either i just capped.off.my leads intending to add one when I get the time. I find myself hanging the light kinda high like at 30-35 inches for the first 2-3 weeks of the seedling stage and slowly.lower the lights down to...

>losing about a pound every 3 months ;) this tells me you fail to understand basic math

I have the 260 watt dual v1 288s in my basement and it's cold like 65 degrees and have been running them 24/7. Just picked up a couple atreum 144.2 to supplement more light and heat and will have to add a heater when I switch to flower but the s life in the frozen northland.

I currently have a v1 qb 260 watt kit and just had 2 of the atreum 144.2 boards delivered to supplement my 3x4 space. They suggest a HLG-120H-36A to run 2 of the 144.2 recommending them to be ran at 60 watts per board. Anyone running these know if there just being conservative with these...

just 90% of the threads here pay the fee become an advertiser

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

That "mars" light looks oddly familiar the one Unit Farm is hawking claims cree and Osram chips

I have the 260 watt kit which is plenty power for a 3x3 however that being said i don't like the spread so much and feel like im always shifting my pots around trying to get them up under it closer. For a budget build with quality components id just use @Humple s build...

I personally ordered a 5 pack of durban poison regs and all germinated and were moved into flower 5 days ago

Qauntum doesn't bring anything up on a site search either

I placed an order with greybeards picked up a 5 pack of Durban poison regs "Greybeard private label" and received a royal queen critical fem bean as a bonus all 6 seeds germed with 8 hour soak and paper towel method in a cabinet on a heating pad. 2 have broken soil today that is all I know so...

Take your politics to toke and talk we don't need that shit here. Let's focus on what brings us together like growing cannabis

I just assembled a 260 watt kit in a 3 x 5 closet in my basement i know it will struggle some beyond the 3x3 footprint but im golden just waiting on some seeds to pop. I found the suggested parts list on the quantum board site general guide section...

If those are 72 volt cobs you might not be pushing enough voltage with that driver led gardener has a tool to look that up http://ledgardener.com/cob-led-driver-selection-tool/

can those.be used with the 260watt kit?

I looked at the 340 watt boards on their website and they remind me of the Meijiu 800 diode FOTOP boards just in nice packaging