DIY with Quantum Boards

[Humple]

This ^

Been doing that myself, my last citizen cob run finished with the cobs pulling 160w total from the wall in a 2x4 space. The qb132's are pulling like 170 watts atm in the same area, once I swap out the driver they'll be pulling even less.

Imo with full coverage from qb's or cobs, and the ability to dim emm and run them closer, watts per square foot means almost nothing. Eg. 220 watts at 18 - 20 inches up, or 140 watts at 8 - 10 inches up, pick your poison.

Very interesting! How was the yield at 160w?

 

[Bubblin]

I think that the "secret" to (comparatively) low-light/high-yield is in uniformity.

Agreed.

Very interesting! How was the yield at 160w?

I never scaled it all, but decent.
It was far from a perfect run, half the drip ring clogged on me, n I didn't know it happened for weeks lol. So I pretty much shit stomped like half the root system...


Single plant under 160w citizen 1818 cobs -> with some 18w led tube side lighting.

 

[Humple]

Agreed.

I never scaled it all, but decent.
It was far from a perfect run, half the drip ring clogged on me, n I didn't know it happened for weeks lol. So I pretty much shit stomped like half the root system...


Single plant under 160w citizen 1818 cobs -> with some 18w led tube side lighting.

Looks great! Yeah, those kinds of set-backs are fucking maddening. I had a "timer issue" (i.e., I made a careless mistake) in my other tent and it took me more than a week to discover that the lights had been on 24/7. By that point the plants had begun to reveg. Lots of new green leaves poking out of the buds now. Motherfucker.

 

[hillbill]

Just started this run using 11 on 13 off, so far everything is going well, be interesting to see at harvest how well it worked for me.

I used 11/13 on Haze and land race Sativas even with HPS but now have mostly COBs in flower and they lack nothing in intensity or spectrum.

 

[zypheruk]

@hillbill that's good to hear. Cheers

 

[CCCmints]

4 x boards in a 4x4 run at say 500watts is what I would aim for in a 4x4space. That will replace a single ended 1kw hps.

How has this claim not already been debunked? Maybe people are comparing against a degraded HPS bulb or something, I'm not sure. The data I have is from a fresh 1k HPS bulb.

4'x4' Reflective Space​

HPS: 892.79 µmoles/m2/s
HLG: 625.00 µmoles/m2/s

I'm without a doubt a proponent for LED, so this isn't 'HPS guy bias'...The HLG-550 doesn't really shine in the light uniformity category either, and even looks marginally outperformed by 1000w HPS in the above data. So definitely less light, and no meaningful difference in uniformity. What makes the HLG-550 a viable replacement for 1000w HPS?

I considered buying quantum boards for my space, but after collecting this data I went with building my own COB arrays. I built 10 fixtures, so the price was near HLG-550 even after applying the 20% coupon code they're currently offering. If you only wanted 1 or 2, COB would be a much pricier option.

I'm currently experimenting with lower light myself. I've got one of my 2.5'x2.5' tents at 150w in flower (at 5 weeks), and so far it's looking damn good. In the same space I've tried both 250w and 200w. I'd say that 250w (40w/sq ft) is definitely too much for the strains I'm growing right now, but it's too early to make the call between 150w and 200w.

I believe light uniformity is more important than it gets credit for. People are always focused solely on the light output. I think with better uniformity, your plants will benefit from higher PPFD due to the absence of PAR spikes.

Its why I decided to design my own fixture. Now that its been assembled and tested, I feel very confident with my lighting system. Nearly 100 more µmoles/m2/s, and much nicer light uniformity. Also note a higher PPFD was achieved even with the absence of PAR spikes. For comparison, the highest point my fixture reached was 1141 µmoles/m2/s while HPS' was 1427.

750w COB Array - 4'x4' Space

 

[a mongo frog]

How has this claim not already been debunked? Maybe people are comparing against a degraded HPS bulb or something, I'm not sure. The data I have is from a fresh 1k HPS bulb.

4'x4' Reflective Space​

HPS: 892.79 µmoles/m2/s
HLG: 625.00 µmoles/m2/s

I'm without a doubt a proponent for LED, so this isn't 'HPS guy bias'...The HLG-550 doesn't really shine in the light uniformity category either, and even looks marginally outperformed by 1000w HPS in the above data. So definitely less light, and no meaningful difference in uniformity. What makes the HLG-550 a viable replacement for 1000w HPS?

I considered buying quantum boards for my space, but after collecting this data I went with building my own COB arrays. I built 10 fixtures, so the price was near HLG-550 even after applying the 20% coupon code they're currently offering. If you only wanted 1 or 2, COB would be a much pricier option.

I believe light uniformity is more important than it gets credit for. People are always focused solely on the light output. I think with better uniformity, your plants will benefit from higher PPFD due to the absence of PAR spikes.

Its why I decided to design my own fixture. Now that its been assembled and tested, I feel very confident with my lighting system. Nearly 100 more µmoles/m2/s, and much nicer light uniformity. Also note a higher PPFD was achieved even with the absence of PAR spikes. For comparison, the highest point my fixture reached was 1141 µmoles/m2/s while HPS' was 1427.

750w COB Array - 4'x4' Space

What about that HLG 600 watt QB thats going around? Should be a beast right? Better fucking be. Please tell me it is......

 

[nfhiggs]

which ONLY tells you how much power your using, and that's pretty meaningless.

No, actually its not - watts are what you PAY for, not photons.

It might not be all that useful for determining the plants lighting needs, but it helps to figure out how efficient your process is.

 

[Budzbuddha]

Alaskan Thunderfuck ..... Baby dropped her shell under 4000k Quantum .

In a week she will be moved to her final home and bask under Quantum light.
Plan to ease her in to the main light , but for now she will get a dimmed 50 watts to get her legs .....

Also popped a Blue Dream SEED that popped out of my cured jar. It is growing very nicely.

Alaskan Thunderfuck



Blue Dream : " jar seed "

 

[pop22]

So you posted some graphs with no reference as to how it was collected, nor by who. Looks like reseller bullshit to me. And your just plain full of shit about the spread of HPS, EVERYONE knows there is a hotspot in the middle unless you cob it up with a light spreader. HPS CAN"T be uniform as its a circular radiation pattern. And there have been several people who've collected data with PAR maps. So if you don't like QB's fine, but don't come here starting troll bullshit.

How has this claim not already been debunked? Maybe people are comparing against a degraded HPS bulb or something, I'm not sure. The data I have is from a fresh 1k HPS bulb.

4'x4' Reflective Space​

HPS: 892.79 µmoles/m2/s
HLG: 625.00 µmoles/m2/s

I'm without a doubt a proponent for LED, so this isn't 'HPS guy bias'...The HLG-550 doesn't really shine in the light uniformity category either, and even looks marginally outperformed by 1000w HPS in the above data. So definitely less light, and no meaningful difference in uniformity. What makes the HLG-550 a viable replacement for 1000w HPS?

I considered buying quantum boards for my space, but after collecting this data I went with building my own COB arrays. I built 10 fixtures, so the price was near HLG-550 even after applying the 20% coupon code they're currently offering. If you only wanted 1 or 2, COB would be a much pricier option.

I believe light uniformity is more important than it gets credit for. People are always focused solely on the light output. I think with better uniformity, your plants will benefit from higher PPFD due to the absence of PAR spikes.

Its why I decided to design my own fixture. Now that its been assembled and tested, I feel very confident with my lighting system. Nearly 100 more µmoles/m2/s, and much nicer light uniformity. Also note a higher PPFD was achieved even with the absence of PAR spikes. For comparison, the highest point my fixture reached was 1141 µmoles/m2/s while HPS' was 1427.

750w COB Array - 4'x4' Space

 

[CCCmints]

So you posted some graphs with no reference as to how it was collected, nor by who. Looks like reseller bullshit to me. And your just plain full of shit about the spread of HPS, EVERYONE knows there is a hotspot in the middle unless you cob it up with a light spreader. HPS CAN"T be uniform as its a circular radiation pattern. And there have been several people who've collected data with PAR maps. So if you don't like QB's fine, but don't come here starting troll bullshit.

Did you even read my post? I collected the data myself with an SQ-500 from Apogee Instruments. Go do it yourself instead of spewing bullshit. You're going to get the same results. No one cares about your theories as to how these lights perform. People care (or should) about cold hard data, which is what I've posted.

The cult following HLG has is interesting to say the least. I expected posts like yours. Go test a 1000w HPS bulb yourself. Until you do, your commentary is of no value.

 

[WeedSexWeightsShakes]

I don’t know about you nerds but I care about results more than data.
These qbs put out results.
End of story.

 

[Budzbuddha]

I like squares ....

 

[a mongo frog]

How has this claim not already been debunked? Maybe people are comparing against a degraded HPS bulb or something, I'm not sure. The data I have is from a fresh 1k HPS bulb.

4'x4' Reflective Space​

HPS: 892.79 µmoles/m2/s
HLG: 625.00 µmoles/m2/s

I'm without a doubt a proponent for LED, so this isn't 'HPS guy bias'...The HLG-550 doesn't really shine in the light uniformity category either, and even looks marginally outperformed by 1000w HPS in the above data. So definitely less light, and no meaningful difference in uniformity. What makes the HLG-550 a viable replacement for 1000w HPS?

I considered buying quantum boards for my space, but after collecting this data I went with building my own COB arrays. I built 10 fixtures, so the price was near HLG-550 even after applying the 20% coupon code they're currently offering. If you only wanted 1 or 2, COB would be a much pricier option.

I believe light uniformity is more important than it gets credit for. People are always focused solely on the light output. I think with better uniformity, your plants will benefit from higher PPFD due to the absence of PAR spikes.

Its why I decided to design my own fixture. Now that its been assembled and tested, I feel very confident with my lighting system. Nearly 100 more µmoles/m2/s, and much nicer light uniformity. Also note a higher PPFD was achieved even with the absence of PAR spikes. For comparison, the highest point my fixture reached was 1141 µmoles/m2/s while HPS' was 1427.

750w COB Array - 4'x4' Space

Was this 1000 watt hps non air cooled at 24 inches? Was it bare at 24 inches?

 

[CCCmints]

Was this 1000 watt hps non air cooled at 24 inches? Was it bare at 24 inches?

This was an EyeHortilux Super HPS bulb in a Blockbuster reflector with a 420CFM CanFan cooling the bulb.

 

[a mongo frog]

This was an EyeHortilux Super HPS bulb in a Blockbuster reflector with a 420CFM CanFan cooling the bulb.

Are you sure your right? This is terrible news. So you own a hlg 550?

 

[CCCmints]

Are you sure your right? This is terrible news. So you own a hlg 550?

I did not purchase an HLG-550 because of the data posted above. I bought the components for 10 COB arrays instead. HLG has the data I used for the above comparisons posted on their website. As for if I'm right, I'm fairly positive I am. I was willing to invest in high quality stuff to get the data I couldn't find a reliable source for on the internet. Now I have an excellent lighting system.

I'm not saying the HLG-550 is useless, and don't want to come across that way. I'm just pointing out the fact that it is not equivalent, nor a viable replacement for, 1000w HPS. You can grow good weed with it, but all this talk about "results" when they're not even properly documenting their grows in as scientific a manner as possible...You literally don't know the results of your grows, so how can you comment on them?

I'm amazed people can see 30% less light output with the same light uniformity flaws and still argue the lesser fixture performs better.

 

[Toohighmf]

Sorry to break up the pee pee match, but I have serious question. I’m currently rocking 4 hlg550s over a 3x16’ and 5 over a 3x18’ table spaced 20” apart. Started my cuts with about 6’ above the canopy and have let my girls grow in to the light. My 4th week of veg, most my girls are pushing 26” after being topped 3x. 2 weeks ago I noticed a mg defic, so I added addl mg sulphate to my jack’s 3-2-1 recipe to 3-2-2 and fixed the mg issue only to follow up with the “splotch” or Ca defic, so I upped my 3-2-2 to 3-3-2, dimmed & raised my lights about 25% 10” (max height) and everything was starting to grow nice and dark again after topping the splotchy spotty deformed top growth. Today I’m seeing chlorosis on a few and this:

I’m at 82F 53-57% RH. 9x hlg550s in a 9’Hx 20’L x 8’W my jack’s 3-3-2 recipe with added h2o2 and a root stim @1.4EC or 1000ppm. I have the slightest bit of tip burn starting today so I’m gonna run a light flush and dilute to 800. Am I just rocking too much useable light? I don’t think this is a nutrient issue. Love to hear from someone using a few of these to discuss. Thanks!

 

[a mongo frog]

Sorry to break up the pee pee match, but I have serious question. I’m currently rocking 4 hlg550s over a 3x16’ and 5 over a 3x18’ table spaced 20” apart. Started my cuts with about 6’ above the canopy and have let my girls grow in to the light. My 4th week of veg, most my girls are pushing 26” after being topped 3x. 2 weeks ago I noticed a mg defic, so I added addl mg sulphate to my jack’s 3-2-1 recipe to 3-2-2 and fixed the mg issue only to follow up with the “splotch” or Ca defic, so I upped my 3-2-2 to 3-3-2, dimmed & raised my lights about 25% 10” (max height) and everything was starting to grow nice and dark again after topping the splotchy spotty deformed top growth. Today I’m seeing chlorosis on a few and this: View attachment 4105762View attachment 4105764

I’m at 82F 53-57% RH. 9x hlg550s in a 9’Hx 20’L x 8’W my jack’s 3-3-2 recipe with added h2o2 and a root stim @1.4EC or 1000ppm. I have the slightest bit of tip burn starting today so I’m gonna run a light flush and dilute to 800. Am I just rocking too much useable light? I don’t think this is a nutrient issue. Love to hear from someone using a few of these to discuss. Thanks!

Where did you get your clones from? Looks like something from Dark heart.

 

[Ryante55]

Sorry to break up the pee pee match, but I have serious question. I’m currently rocking 4 hlg550s over a 3x16’ and 5 over a 3x18’ table spaced 20” apart. Started my cuts with about 6’ above the canopy and have let my girls grow in to the light. My 4th week of veg, most my girls are pushing 26” after being topped 3x. 2 weeks ago I noticed a mg defic, so I added addl mg sulphate to my jack’s 3-2-1 recipe to 3-2-2 and fixed the mg issue only to follow up with the “splotch” or Ca defic, so I upped my 3-2-2 to 3-3-2, dimmed & raised my lights about 25% 10” (max height) and everything was starting to grow nice and dark again after topping the splotchy spotty deformed top growth. Today I’m seeing chlorosis on a few and this: View attachment 4105762View attachment 4105764

I’m at 82F 53-57% RH. 9x hlg550s in a 9’Hx 20’L x 8’W my jack’s 3-3-2 recipe with added h2o2 and a root stim @1.4EC or 1000ppm. I have the slightest bit of tip burn starting today so I’m gonna run a light flush and dilute to 800. Am I just rocking too much useable light? I don’t think this is a nutrient issue. Love to hear from someone using a few of these to discuss. Thanks!

3-3-2? I haven't heard of that I run 3-2-1 Jack in Coco it's actually 3.6g 2.4g 1.2g per gal