Quantum Boards or COBS?

Roger A. Shrubber

Roger A. Shrubber

Well-Known Member
yoda, you don't like leds. i don't know if leds molested you as a child, or if leds stole your bicycle, or beat you up and stole your halloween candy, but you have issues with leds.
one of the few good things about the world, is you can use whatever you want. so i'll use quantum boards and cobs.
i've "heard" you call them pcb boards that had already been tried and failed. i say the boards you're talking about were prehistoric and did indeed suck. the new tech changes all that. comparing hid to led is like comparing an elephant to an ant, hid gets things done with brute force, led may be smaller, but its even stronger in scale
 
Yodaweed

Yodaweed

Well-Known Member
Roger A. Shrubber said:
yoda, you don't like leds. i don't know if leds molested you as a child, or if leds stole your bicycle, or beat you up and stole your halloween candy, but you have issues with leds.
one of the few good things about the world, is you can use whatever you want. so i'll use quantum boards and cobs.
i've "heard" you call them pcb boards that had already been tried and failed. i say the boards you're talking about were prehistoric and did indeed suck. the new tech changes all that. comparing hid to led is like comparing an elephant to an ant, hid gets things done with brute force, led may be smaller, but its even stronger in scale
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Quantum boards are PCB LEDs(which are LEDs mounted to a PCB)....even says so on the QB thread...i don't know why you would say otherwise....and i have nothing against LEDs they are just inferior lights that cost a lot and produce subpar results.
 
SouthCross

SouthCross

Well-Known Member
Roger A. Shrubber said:
yoda, you don't like leds. i don't know if leds molested you as a child, or if leds stole your bicycle, or beat you up and stole your halloween candy, but you have issues with leds.
one of the few good things about the world, is you can use whatever you want. so i'll use quantum boards and cobs.
i've "heard" you call them pcb boards that had already been tried and failed. i say the boards you're talking about were prehistoric and did indeed suck. the new tech changes all that. comparing hid to led is like comparing an elephant to an ant, hid gets things done with brute force, led may be smaller, but its even stronger in scale
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Back in 2005, LEDs were a joke. Sorely underpowered. Came across as a gimmick. The stigma carried with me. Wholey $hit if that's hasn't changed. Low heat, low volts, and constant spectrum. Twice as powerful.

The Light is the #1 tool in this scheme. It'll cost the most money as it should. Everything else like pots, fertilizer, exhaust fan. That's secondary. The lights come first.
 
Yodaweed

Yodaweed

Well-Known Member
SouthCross said:
Stack the money upfront on COBs. You can forget that bulb changing drama.
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No thanks, then i would have to supplement with IR/ UV / and heat my room to achieve proper grow temps, really not worth it to me. Those UV T5 bulbs are super expensive too. I have a 4x4 tent dedicated to running LEDs , that's where i play around with 1-2 plants.

Also i'd like to point out every time i look at QB grows the plants are TINY, do all you LED guys shoot for like 2 oz per plant cause that's what i always see. Here in Colorado we can only grow 12 plants, 6 flowering max, and i smoke a lot and so does my girlfriend, if i got 2 oz per plant my grow would be useless.
 
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SouthCross

SouthCross

Well-Known Member
Yodaweed said:
No thanks, then i would have to supplement with IR/ UV / and heat my room to achieve proper grow temps, really not worth it to me. Those UV T5 bulbs are super expensive too.
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You said I listed excuses. Respect but your a liberal. Grow liberal instead of conservative. Change the tradition and recognize change. You can grow plants with half the electricity. There's some kind kinda Green in that. Save the earth and what not...

Embrace the modern. COBs are in the headlights of cars. The bulbs from the twenty century is what it, it is. Outdated waste of spectrum and electricity.
 
Yodaweed

Yodaweed

Well-Known Member
SouthCross said:
You said I listed excuses. Respect but your a liberal. Grow liberal instead of conservative. Change the tradition and recognize change. You can grow plants with half the electricity. There some kind kinda Green in that. Save the earth and what not...

Embrace the modern. COBs are in the headlights of cars. The bulbs from the twenty century is what it, it is. Outdated waste of spectrum and electricity.
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That's a make believe in your head, if i cut my wattage in half my yield would suffer immensely, just read this side by side.

https://www.rollitup.org/t/test-room-de-hps-vs-citizen-cobs.935306/


I feel like most of the LED guys don't have much experience and just talk out their ass. That side by side proves DE HPS is still the top for price per coverage and price per yield. That guy literally got pounds more under the HPS than the LEDs and i have had similar experiences with my grow. I still fool around with my LEDs in my small 4x4 tent but that's not my production room for my medical needs, that's just for fun.

I have similar to QB mid-ranged PCB LEDs (all white and red) and COB leds(CXA2590 x4) in that LED room right now
 
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SouthCross

SouthCross

Well-Known Member
Half the electricity, 1/4th the heat, twice as powerful. Let that soak in.

Just when you lose faith in humanity they come up with COBs.
 
Yodaweed

Yodaweed

Well-Known Member
SouthCross said:
Half the electricity, 1/4th the heat, twice as powerful. Let that soak in.

Just when you lose faith in humanity they come up with COBs.
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You aren't very good at science are you? Heat is determined by wattage not the type of light....1000w of HPS will produce the same heat as 1000w of COBs. Read the first law of thermodynamics if you want to get some education.

The lack of knowledge in this section is real. Try not to drink too much of that koolaid .
 
SouthCross

SouthCross

Well-Known Member
Yodaweed said:
You aren't very good at science are you? Heat is determined by wattage not the type of light....1000w of HPS will produce the same heat as 1000w of COBs. Read the first law of thermodynamics if you want to get some education.

The lack of knowledge in this section is real. Try not to drink too much of that koolaid .
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Why do you resist the possibility of change? Tailored spectrum with no measurable degrade...for Years.

You'll convert to the dark side. Start hanging COBs. Filling the jars with dank a-de-dank without the heat. Wanna get those colors? You can run them cold with COBs.
 
Yodaweed

Yodaweed

Well-Known Member
SouthCross said:
Why do you resist the possibility of change? Tailored spectrum with no measurable degrade...for Years.

You'll convert to the dark side. Start hanging COBs. Filling the jars with dank a-de-dank without the heat. Wanna get those colors? You can run them cold with COBs.
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I have a room full of LEDs for testing purposes, did you not read my previous replies? I have grown the same strain of white fire og under a hps, under a cmh, under a PCB LED with white/red diodes, under a blurple LED, and under a CXA2590 light/.

I got the most colors under the CMH 4k bulb. Biggest buds under the HPS, LEDs do ok, but nothing special. I could see LEDs to be useful for growing lettuce or greens, since you could use a blue spectrum and control it with a dimming switch and UV/IR light isn't very helpful for lettuce growing (at least in my lettuce growing experience).

The main feature i like about my LEDs is the fact they can be dimmed down if you don't need full strength light, but a dimmable ballast can do similar so i don't feel it's super special.
 
SouthCross

SouthCross

Well-Known Member
Yodaweed said:
I have a room full of LEDs for testing purposes, did you not read my previous replies? I have grown the same strain of white fire og under a hps, under a cmh, under a PCB LED with white/red diodes, under a blurple LED, and under a CXA2590 light, i am the one with experience here not you.

I got the most colors under the CMH 4k bulb.
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Working up to COBs... I did the same thing. Those coloured lights are to get you buy it. Wow, plants grow in purple light! That's gotta be the best. It's purple!

*clicks the buy button.
 
Yodaweed

Yodaweed

Well-Known Member
SouthCross said:
Working up to COBs... I did the same thing. Those coloured lights are to get you buy it. Wow, plants grow in purple light! That's gotta be the best. It's purple!

*clicks the buy button.
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Just no reason to keep upgrading your lights for a small increase in efficiency, that's like upgrading your computer every time a new processor is released, when i built this computer i didn't buy the best processor or motherboard or ram, i bought at least 2nd best to get a better value.
 
Roger A. Shrubber

Roger A. Shrubber

Well-Known Member
the law says what it says, but you didn't read it all, efficiency matters, the 1000 watts is used up, all of it, but not all of it is heat, or else the lights wouldn't....light. leds are 80%+ efficient. less than 20% is heat.
hps is 55% efficient, 45% is heat.....
 
Yodaweed

Yodaweed

Well-Known Member
Roger A. Shrubber said:
the law says what it says, but you didn't read it all, efficiency matters, the 1000 watts is used up, all of it, but not all of it is heat, or else the lights wouldn't....light. leds are 80%+ efficient. less than 20% is heat.
hps is 55% efficient, 45% is heat.....
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All watts are created equally, so yea 1000w is 1000w no matter the light source, sorry you don't understand basic physics.

Please read this thread if you are having an issue with the basic understanding of how heat is produced.

https://www.rollitup.org/t/heat-from-1200w-of-1212s-vero-29s-cxm-22-cxb3590-compared-to-2x-600w.936071/


here's a great quote from that thread that explains very well

frica said:
Yes, good LEDs put out more light.

That light eventually also turns into heat..
Photosynthesis while endothermic is very inefficient so negligible.


Energy that's stored inside the plant doesn't turn into heat (only a very tiny amount).
So 1200W of LED practically produces just as much heat as 1200W of HPS.

But the radiation of the 2 sources is different.
HPS has some IR which will radiate right on your plants and you can assume all of that will turn into heat the moment it hits your plant.
So even if room temp is equal, plants under HPS will have warmer leaves because of the IR radiating on the leaves. Something to consider.

Even funnier if you're trying to grow with incandescent, should be very hard since incandescent bulbs are extremely efficient IR producers and will easily fry your plants even if ambient temperature isn't very high.
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If you need more help i'm sure @Stephenj37826 , @CobKits , @frica , could explain more eloquently than i could
 
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SouthCross

SouthCross

Well-Known Member
You're a COB user that hasn't come out the closet.

We can set you up. Through personal experience. What wattage and where to hang the lights. Color temperature? We've got that covered too.

When you wanna upgrade. Say the word.
 
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