Think ive been led astray

Stephenj37826 said:

I was guessing 35% on the LEDs but was going by a lower Tj temp. If a fan was pointed at the heat sink I think it would improve a decent amount.

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So was I. It's great that our guesses are being confirmed by independent and professional testing.

It would be interesting to see some of the DIY lights go through this test. I have a feeling paper math does not directly translate to grow room performance.
It's interesting that this is tested basically as a "lighting" fixture? No mention of par or μmole.

And the best part for "cool" running led's

"Luminous Flux, Radiant Flux

Radiant flux is a measure of the total power of electromagnetic radiation emitted from the luminaire or lamp, while luminous flux is a measurement that is weighted based on human visual perception. Measurements are recorded once per minute over a sufficient period of time to allow the sample to reach thermal equilibrium. In the case of this luminaire, it took approximately 52 minutes to stabilize. Photometric output is not charted over time because the heat load from the luminaire was too high to operate with the sphere closed without impacting the stabilization."

OneHitDone said:

It would be interesting to see some of the DIY lights go through this test. I have a feeling paper math does not directly translate to grow room performance.
It's interesting that this is tested basically as a "lighting" fixture? No mention of par or μmole.

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It'd certainly be interesting. But this test assures me that it can't very off.
It's a standard lighting test by Cree. I don't think they offer a horticultural one.

OneHitDone said:

And the best part for "cool" running led's

"Luminous Flux, Radiant Flux

Radiant flux is a measure of the total power of electromagnetic radiation emitted from the luminaire or lamp, while luminous flux is a measurement that is weighted based on human visual perception. Measurements are recorded once per minute over a sufficient period of time to allow the sample to reach thermal equilibrium. In the case of this luminaire, it took approximately 52 minutes to stabilize. Photometric output is not charted over time because the heat load from the luminaire was too high to operate with the sphere closed without impacting the stabilization."

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too small IS

OneHitDone said:

μmole.

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Stephenj37826 said:

Just think they got 1.8 g/w with xbd one. Gawd I bet my fixture will hit 4 g/w wooohoooo. I think I would retract that ridiculous claim video as fast as I could. At least they manned up and finally showed some facts.

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Lost me when you said this gram per watt is so inconsistent no real growers are measuring that . Way too many items to factor in such as veg time, time of day using light ,other electronic sources aiding the grow, strain, feeding schedule , etc.... Here's an example
I veg a plant for 1 month, flower for 2 months total yield = 40 grams
I veg a plant for 2 months , flower for 2 months total yield = 40 grams
Those two plants have the same gram per watt but completely different amounts of light used because vegging times are different. Gram per watt is basically a pissing contest.

Yodaweed said:

Lost me when you said this gram per watt is so inconsistent no real growers are measuring that . Way too many items to factor in such as veg time, time of day using light ,other electronic sources aiding the grow, strain, feeding schedule , etc.... Here's an example
I veg a plant for 1 month, flower for 2 months total yield = 40 grams
I veg a plant for 2 months , flower for 2 months total yield = 40 grams
Those two plants have the same gram per watt but completely different amounts of light used because vegging times are different. Gram per watt is basically a pissing contest.

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Oh I know that just saying I don't care how long you veg those suckers it would be just short of a miracle if you hit 1.8* the wattage draw of an SK as suggested in the video.

Stephenj37826 said:

Oh I know that just saying I don't care how long you veg those suckers it would be just short of a miracle if you hit 1.8* the wattage draw of an SK as suggested in the video.

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That's because spectrum king is participating in the pissing contest.

Yodaweed said:

Lost me when you said this gram per watt is so inconsistent no real growers are measuring that . Way too many items to factor in such as veg time, time of day using light ,other electronic sources aiding the grow, strain, feeding schedule , etc.... Here's an example
I veg a plant for 1 month, flower for 2 months total yield = 40 grams
I veg a plant for 2 months , flower for 2 months total yield = 40 grams
Those two plants have the same gram per watt but completely different amounts of light used because vegging times are different. Gram per watt is basically a pissing contest.

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g/w/t works, though. Grams per watt over time. Time is always what we omit from formulae to improve our apparent statistics. Most real answers start with "compared to" or "depending on" - or similar words to that effect. The question left remaining is almost always "compared to what?" - hence the Theory of General Relativity.

Yodaweed said:

That's because spectrum king is participating in the pissing contest.

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So it seems lol.

Michael Huntherz said:

g/w/t works, though. Grams per watt over time. Time is always what we omit to improve our apparent statistics. Most answers start with "compared to" or "over timeline x" - words to that effect. The question is almost always "compared to what" - hence the Theory of General Relativity.

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Those stasticis are flawed. Genetics play way too big a part in any weight measurements. Here's an example:
You grow Big Bud
I grow a Haze plant
You will yield more than me but my bud will be way higher quality and taste not like shit like big bud does.
Not to mention chemically grown buds yield more but I don't care to smoke cancer so I grow organic and yield less than I used to but smoke way better now.

Yodaweed said:

Those stasticis are flawed. Genetics play way too big a part in any weight measurements. Here's an example:
You grow Big Bud
I grow a Haze plant
You will yield more than me but my bud will be way higher quality and taste not like shit like big bud does.

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That is also true. Fuck Big Bud. I got some Delahaze running right now, much rather have 4oz of that than 12oz of Big Bud. (I might get a QP out of this plant...week five and looking strong. Lemons and mangoes, errywhere)

Lol, did I say grams? hahahaha

Yodaweed said:

Lost me when you said this gram per watt is so inconsistent no real growers are measuring that . Way too many items to factor in such as veg time, time of day using light ,other electronic sources aiding the grow, strain, feeding schedule , etc.... Here's an example
I veg a plant for 1 month, flower for 2 months total yield = 40 grams
I veg a plant for 2 months , flower for 2 months total yield = 40 grams
Those two plants have the same gram per watt but completely different amounts of light used because vegging times are different. Gram per watt is basically a pissing contest.

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In most instances I totally agree. But in this particular video it supposed to be side by side comparison all factors the same. So veg time environment media strain all from clones. As close as one can get to test these things.


Don't take me wrong I'm not believing the results of that video though lol.

Michael Huntherz said:

That is also true. Fuck Big Bud. I got some Delahaze running right now, much rather have 4g of that than 12g of Big Bud.

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Exactly, fuck big bud it tastes like shit, almost all those commercial strains have hardly shit for taste. Like all these people grow blue dream cause its so easy to grow and yields a lot but in my opinion it tastes like shit ( I have had blue dream from like 30 different sources always tastes the same).

Stephenj37826 said:

In most instances I totally agree. But in this particular video it supposed to be side by side comparison all factors the same. So veg time environment media strain all from clones. As close as one can get to test these things.


Don't take me wrong I'm not believing the results of that video though lol.

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They have a 1000 watt hps running next to that thing....those stats are complete lies.

Amount of material / KWH ?

Abiqua said:

Amount of material / KWH ?

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Back to what I said, genetics too big a factor to use that as a measuring point unless you are planning to grow the exact same strain under the exact same conditions and trying to up your yield.

Yodaweed said:

Back to what I said, genetics too big a factor to use that as a measuring point unless you are planning to grow the exact same strain under the exact same conditions and trying to up your yield.

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Which could be said about any other metric when growing Cannabis

I average my set of strains, because yes, my average yields would be higher, if I grew only my lankies or something like that....

I have two girls, same veg, different flower times.....The shorter flower yields less, but might actually be higher in Material/KWH.....

Yodaweed said:

Back to what I said, genetics too big a factor to use that as a measuring point unless you are planning to grow the exact same strain under the exact same conditions and trying to up your yield.

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But then, do you run the same strain (clone-only to match Pheno) under HID with Air Conditioning vs. the same kwh in High-efficiency COB panels with AC too? Or leave the AC off for both? I'm not sure a direct comparison is possible.

Abiqua said:

Which could be said about any other metric when growing Cannabis

I average my set of strains, because yes, my average yields would be higher, if I grew only my lankies or something like that....

I have two girls, same veg, different flower times.....The shorter flower yields less, but might actually be higher in Material/KWH.....

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Yea I got a plant that flowers fast and yields a lot (golden goat) and I wouldn't compare it to my skywalker og which is a lanky bitch with low yield and rock hard but small buds.

I think we have a different idea on metrics should be measured...I don't have the word comparison in mine.