All LED Indoor Grow- Quantum Boards vs AutoCob's

I'm using a 12 x 13-foot room. I know some of the heat saved is in IR the high pressure bulbs puts out. I think that is in the range of 15%.
We will be using about 2kW of COBs. The difference for FLIR is that the bulbs concentrate all the heat into a small space of the filament whereas it is spread more evenly over the whole heatsink area with LED.

Hash church is on live on youtube, fun weed chat

ANC said:

I'm using a 12 x 13-foot room. I know some of the heat saved is in IR the high pressure bulbs puts out. I think that is in the range of 15%.
We will be using about 2kW of COBs. The difference for FLIR is that the bulbs concentrate all the heat into a small space of the filament whereas it is spread more evenly over the whole heatsink area with LED.

Hash church is on live on youtube, fun weed chat

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FLIR reads the heat of the surfaces in the image; roofs, walls, windows. It does not peer inside the building. People get caught when their whole building is significantly hotter, or more often, a heat plume is escaping from the building in an odd spot.

Send your excess heat up the chimney or out the dryer vent and you'll be fine.

Our cops have a $150000 FLIR camera, the resolution on that thing is fucking amazing.
I know how the older FLIR cameras work. Well, they can all be beaten with the right preparation, but double insulation gets expensive.
They busted 6 grows here over the last few months, and this is a tiny town.

It is winter now, so some heating indoors is expected.

ANC said:

Our cops have a $150000 FLIR camera, the resolution on that thing is fucking amazing.
I know how the older FLIR cameras work. Well, they can all be beaten with the right preparation, but double insulation gets expensive.
They busted 6 grows here over the last few months, and this is a tiny town.

It is winter now, so some heating indoors is expected.

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I'll be willing to bet their electric bill was the giveaway. This is the real reason for high efficiency LED lighting.

Evil-Mobo said:

Oh I know about topping and they have been topped various times as is but just going off of the starting height for flowering and looking at minimum distance needed between light and canopy and available height and it's not adding up to me lol

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I've super-cropped them at or after the flip with no ill effects, or LST them through some trellises or the like as you mentioned.

Evil-Mobo said:

Oh I know about topping and they have been topped various times as is but just going off of the starting height for flowering and looking at minimum distance needed between light and canopy and available height and it's not adding up to me lol

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I would say it depends on the size and shape of the plant, and as Moflow said, how brittle or supple your branches are. If you have a lot of plant mass and they are still pliable, then training them on a screen might help, but its tricky to do late in a grow.

I feel your pain though, in my current indoor it seems like I'll be taking my lights off the pulleys by the time the stretch stops and attaching them directly to the top of the tent to get back that 6". This is my first time using Citi 1818's running at 75 and 87.5w, so I'm going to learn (one way or another) how much distance they need from the plants. So far I've been keeping them at 16" from the canopy and the plants seem to be doing really well. I don't know if I'll be able to maintain that distance, I've never grown this strain before and I have no idea how much its stretches.

ANC said:

Our cops have a $150000 FLIR camera, the resolution on that thing is fucking amazing.
I know how the older FLIR cameras work. Well, they can all be beaten with the right preparation, but double insulation gets expensive.
They busted 6 grows here over the last few months, and this is a tiny town.

It is winter now, so some heating indoors is expected.

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wow that sounds brutal, my whole country is going rec legal next summer. 4 plants per house i think.

legalcanada said:

wow that sounds brutal, my whole country is going rec legal next summer. 4 plants per house i think.

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Legalization will go worldwide in 10 years. The only places it won't be legal will be police states.

Hey @Roger A. Shrubber and @ttystikk and everyone else.

This 1000w light of any kind will produce 1000w of heat thing has been bothering me for some time, since its one of those things often repeated on here. I'm wondering if its been repeated so much we tend to believe it without question?

So my thoughts until been told this "science fact" were light converted to photosynthesis (no matter how small that is) is been used as that and not turned to heat.
I hear the argument "if you put 100w Y bulb and 100w X bulb in a closed box the same heat will be created because energy cant be destroyed or created and 100w is 100w"

So I just had a google about, which I have tried before, but today I find something interesting, which to me disproves the argument above!
I respect all your opinions so please check out this link and look at the two experiments and tell me if I'm wrong and why I'm wrong if I am.

http://www.reptileuvinfo.com/html/watts-heat-lights-lamp-heat-output.html

legalcanada said:

wow that sounds brutal, my whole country is going rec legal next summer. 4 plants per house i think.

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Yeah we'll see how that 4 plant personal grow thing goes. That's the proposal at the federal level but the provinces and even municipalities will have the option to further regulate it. Depends on your province more than anything imo. I'd like to think Ontario will allow it but historically we've had some idiotic regulations around things like booze and I'm not seeing anything pointing to more liberal policies like home grows, hopefully I'm wrong...

legalcanada said:

wow that sounds brutal, my whole country is going rec legal next summer. 4 plants per house I think.

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Yeah, we are in legal limbo, the court has found the laws to be unconstitutional and gave the government 18 months to change them... we are now in that period. They are still busting people.

coreywebster said:

Hey @Roger A. Shrubber and @ttystikk and everyone else.

This 1000w light of any kind will produce 1000w of heat thing has been bothering me for some time, since its one of those things often repeated on here. I'm wondering if its been repeated so much we tend to believe it without question?

So my thoughts until been told this "science fact" were light converted to photosynthesis (no matter how small that is) is been used as that and not turned to heat.
I hear the argument "if you put 100w Y bulb and 100w X bulb in a closed box the same heat will be created because energy cant be destroyed or created and 100w is 100w"

So I just had a google about, which I have tried before, but today I find something interesting, which to me disproves the argument above!
I respect all your opinions so please check out this link and look at the two experiments and tell me if I'm wrong and why I'm wrong if I am.

http://www.reptileuvinfo.com/html/watts-heat-lights-lamp-heat-output.html

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This is interesting. @Stephenj37826 do you have any thoughts on this?

ttystikk said:

A watt of output is a watt of heat, period.

The efficiency advantage is in using less watts to get the same results. Thus, less heat.

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Although I usually would defer to you on any cannabis topic, I have to take issue with the concept that a watt of output is a watt of heat. By definition in physics, heat generated by a system is waste energy. Now if the system happens to be designed to make use of the heat, then the closer you get to 100% waste energy the better. In the case of lighting, the opposite is true. The more photons you generate and the less heat, the better.
For purposes of this discussion, we're only considering the characteristics of the electrical circuit, not what happens to the photons after they are created.
So to summarize, in order to have a quantifiable discussion, let's limit the analysis to the actual output of the devices being compared and avoid the environmental factors that can vary significantly and are beyond our ability to predict.

Bosgrower said:

Although I usually would defer to you on any cannabis topic, I have to take issue with the concept that a watt of output is a watt of heat. By definition in physics, heat generated by a system is waste energy. Now if the system happens to be designed to make use of the heat, then the closer you get to 100% waste energy the better. In the case of lighting, the opposite is true. The more photons you generate and the less heat, the better.
For purposes of this discussion, we're only considering the characteristics of the electrical circuit, not what happens to the photons after they are created.
So to summarize, in order to have a quantifiable discussion, let's limit the analysis to the actual output of the devices being compared and avoid the environmental factors that can vary significantly and are beyond our ability to predict.

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When the photons land on something, they become heat energy again.

I'm sure I'm missing something.

Well small update. I was intending on chopping down the chemdogging today, but she's just not ready yet lol. I will leave her another day or so and might even do a staggered harvest and take the top portion of the plant first and let the lowers go some more, will play it by ear. I decided to do LST and throw up a trellis net in the QB tent. I super cropped a couple of the tops as well. So I will end up doing the same to the COB girls when they go in there, in an effort to keep things as similar as possible between tents. Hope this works out ok lol, now I'm getting nervous and it takes a lot to do that doe me lol..........

QB tent with net laid out and training:





Shot of the COB tent doing it's thing finishing up, can't finish fast enough for me so I can get the SBA in here lol



Shot of the Narcotic Kush:



Shot of the chemdogging:



And a shot of the veg closet.............



Thanks for checking in

ttystikk said:

When the photons land on something, they become heat energy again.

I'm sure I'm missing something.

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Not really ... We're just dealing with apples and overheated oranges. I'm limiting my focus to the inputs to the system ... specifically the characteristics of a light fixture and you are expanding the focus to the entire closed system.
We can both be correct but in order to have a meaningful dialogue we have to share the same parameters

Bosgrower said:

Not really ... We're just dealing with apples and overheated oranges. I'm limiting my focus to the inputs to the system ... specifically the characteristics of a light fixture and you are expanding the focus to the entire closed system.
We can both be correct but in order to have a meaningful dialogue we have to share the same parameters

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Since it's indoors and we're taking ambient temperature readings, I suggest we use closed system assumptions.

Humanrob said:

I would say it depends on the size and shape of the plant, and as Moflow said, how brittle or supple your branches are. If you have a lot of plant mass and they are still pliable, then training them on a screen might help, but its tricky to do late in a grow.

I feel your pain though, in my current indoor it seems like I'll be taking my lights off the pulleys by the time the stretch stops and attaching them directly to the top of the tent to get back that 6". This is my first time using Citi 1818's running at 75 and 87.5w, so I'm going to learn (one way or another) how much distance they need from the plants. So far I've been keeping them at 16" from the canopy and the plants seem to be doing really well. I don't know if I'll be able to maintain that distance, I've never grown this strain before and I have no idea how much its stretches.

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You could always dim the cobs the last week or two if too close.
I'm reducing wattage in main room by 100 watts tomorrow, week 7.
I run bare cobs so can get real close if needed without any issues.

Moflow said:

You could always dim the cobs the last week or two if too close.
I'm reducing wattage in main room by 100 watts tomorrow, week 7.
I run bare cobs so can get real close if needed without any issues.

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Thanks for the suggestions. I run them bare also. The ones in there have internal dimming, I find it to be less user-friendly the the external ones I have (had to try it though). I think if I run out of room, since I have no other indoor grows going I'd switch the lights out for some I have that run @50w. These two hotter lights were ones I built but had not used yet, so I wanted to see how they do. They were designed to run in 2x2's, running at between 37 and 43w/sf.

Sorry, but we are growing Cannabis people. The fact we have plants in out tents/growing areas is a matter of vital importance when working this out.

Obviously bigger extraction and other environment issues changes things.... Yeah, forget all that bollocks, but do not disregard the fact that the plants are using the light, therefore some is Not being turned into heat.

Why ignore the main reason 'why more efficient light which is useable by the plants' runs cooler?

That defeats the object. We are growing weed, not drying washing, or heating up garages!