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Well just got some depressing news. Someone was kind enough to test out a QB288 board for me at 500 ma at 18 inches the ppfd was 150. At 7 inches it was 500 ppfd. :( I grabbed 9 boards anyone have any ideas how i can use those 9 boards to compete with a CMH 315 (348 watts) in a 3x3 without...

Same here

Anyone ever get gg4 to mold ? Im starting to think she has a high resistance to humidty.

I like the 1 cob/led/QB per sq ft. As far as the CXM22 ( which i think those are 50v ) it just depends what amperage you want. How hard you want to run 8 in a 3x3 on that driver HLG 320H-48A will give you about 800 ma per cob. Its not an overkill if your lowering your amperage and using more...

Looks similar to a ph issue. Have you had any PH swings ?

Anyone ever get a batch of healthy seeds that just didnt want to break shell. I tried soaking them longer and the ones i have in a paper towel i have actually taken a pair of scissors and tried to snip the tip or get the shell to crack some at its seam. I have heard about sandpaper and matchbox...

I grabbed a pack of the BX3 some where runts or more sour bubble leaning and a couple hermies. Either you get lucky and find a special pack with multiple keepers or your the guy who got the pack with all the duds. Either way its not stable and if it was we would all be seeing similar plant...

Hey robin I have 9 of the qb288 (54v ) When I wire these I'm going to use one MeanWell HLG-240H-54B I want to run the boards soft around 500 ma so I will want to wire these parrel positive to positive negative to negative across all 9 boards so they split the 4.5 amps Is that correct ?

thanks :)

When a driver has something like this Output Voltage V1 Nominal 27-54 V for the HLG-240H-54B does that mean it will run the board/cob between 27 and 54 volts ? will that driver run 9x QB 288 (new 54V design) ?

can someone out there take a PAR reading or map the PPFD from the qb 288 or 304 ran at 500ma or even 700 ma ? I pasted a copy of this saying 3.02μmoles/joule. Would love to actually see what a meter is saying. Voltage (Min Vf dc) Voltage (Max Vf dc) Current (mA) Watts at Board (Min Watts)...

Could someone recommend a driver(/s) to run 9x QB288 with a current around 500 ma per board. Only looking to use 300-350 max watts all together. Would be grateful for the help a little lost with the drivers and whats required with min max volts and what not.

Yah i am impressed with what cmh can do but we all wanna try the new toys :) Before i get to invested i might just test 1 cob at one sq ft and see what it can do before i go balls to the wall.

If i only use 25-30 watts per sq foot and get the 700-1000 par per sq ft then thats my goal. Unless im understanding something wrong, running them soft is more effiecient and adding way more cobs/ boards to get the ppdf / par would be the most effecient set up not economical though which i...

hehe well dont listen to me either but the only way to find out is to grab one and try it :P

Im pretty lazy and reuse coco with minimal effort and a week of veg i get 14-16 oz per 315 cmh (philips 3100k). Just buy one test it out and don't listen to other people.

I was talking about running 36 x 90watt boards at 350ma ( about 27 watts a sq ft) :P

FUCK!!! by using your measurement it would cost almost $6k to light a 6x6 tent.. I Had dreams, You crushed them! Back to corn on the COB.

I saw a video on youtube where someone took par readings at 100% power and 50% power and it was a big drop in par. But from what i have watched with the DIY videos there was a way to push the driver but run the led with less amps making it more efficient. Do these quantum boards not work the...

Im curious, watching videos on diy leds where 3590 cobs are ran at 700ma around 28 watts a sq ft. So i was curious if you could run the HLG 550 with a different driver that will run the leds with less wattage but more efficient ?