SupraSPL
Well-Known Member
Yep, DE lamp won in that comparison. I don't dispute that and I don't recommend any of the LED lamps in that test. Speaking of parroting, the data you posted is exactly what we were just discussing.
Gavita double ended...
- Thread starter Gquebed
- Start date
Positivity
Well-Known Member
Forgot about the snow melting thingy..
Take back what i said about buying one tomorrow in a cold climate. Instead i'd build a insulated growbow at the foot of my bed. Adjust the cobs to run at exactly the temp i want and have the slow exhaust warm my toes
Take back what i said about buying one tomorrow in a cold climate. Instead i'd build a insulated growbow at the foot of my bed. Adjust the cobs to run at exactly the temp i want and have the slow exhaust warm my toes
SupraSPL
Well-Known Member
That is some useful data and I do like my vegging room warm, as long as they dont stretch too much. But I think it is ill advice to run your flower room at 83f in the last half of flowering. Especially if you are using HPS. It affects flower density and trichome quality, certain varieties especially.
A few years back when I switched from mini DIY LED to 2400W HPS, it took me awhile to figure out why my nugs were coming out fluffier, different flavor and nowhere nearly as sticky. Eventually I realized it was partly due to the lack of blue, but mostly due to heat in the canopy. And that heat did not improve my gpw it was much lower with HPS than with LED, every single time no matter which way I cut it. That said, the HPS allowed me to put down plenty of light on the cheap, quickly and easily. So I stayed with HPS until COBs came out.
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churchhaze
Well-Known Member
I've heard mixed things about canopy temperatures. I think it's different for sativa and indica varieties, but I like to keep my temperatures in the 80s whenever possible to generate the most photosynthesis and phosphorous availability.
Increasing potassium for higher temperatures makes sense to help with the extra water transpiration requirements.
Increasing potassium for higher temperatures makes sense to help with the extra water transpiration requirements.
PSUAGRO.
Well-Known Member
SHOW ME
wanna see actual proof, side by side, not friends said so...............maybe I don't want the extra heat and know what mogul 1000w hps can do.......lolyou know what i don't get though, is 250c heat diff on 150+- watt bump?
do you believe those lumen maintenance #s are legit running @ 1150w??
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churchhaze
Well-Known Member
Lets be fair.. anyone running a reasonable amount of power in that duplex would have gone under the rather regardless of whether it was gavita, mogul hps, or modern white leds. They must have had at least 4000W up there for their roof to have melted..
What was the ambient temperature in that room anyway? 150F? The story seems blown out of proportion to me.
What was the ambient temperature in that room anyway? 150F? The story seems blown out of proportion to me.
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bicit
Well-Known Member
I'm pretty sure sativied is just a troll. His posts offer nothing, the results from members here using cob tech are undeniable. We're all shills! and liars.
shill
SHil/
North American, informal
noun
noun: shill; plural noun: shills
1.
an accomplice of a hawker, gambler, or swindler who acts as an enthusiastic customer to entice or encourage others.
Does anyone own any stocks in any lighting companies?
shill
SHil/
North American, informal
noun
noun: shill; plural noun: shills
1.
an accomplice of a hawker, gambler, or swindler who acts as an enthusiastic customer to entice or encourage others.
Does anyone own any stocks in any lighting companies?
hyroot
Well-Known Member
like i said @Sativied came in here to try and make everyone argue. He copy and pasted shit he doesn't understand. He refuses to have an intellectual discussion. Just tries to put everyone down.
his journal, he uses a 600 watt hps thats not a gavita
if there was the same thought process in other technologies. We'd still be talking on a rotary phone. watching black and white tube tv's , driving gas guzzling chevy bel airs. it would be like Cuba every where
his journal, he uses a 600 watt hps thats not a gavita
if there was the same thought process in other technologies. We'd still be talking on a rotary phone. watching black and white tube tv's , driving gas guzzling chevy bel airs. it would be like Cuba every where
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a mongo frog
Well-Known Member
Positive sativied is a great member here. So many people in this thread know so much. This is the greatest thread in some time. Its an honor to read all this info.
bicit
Well-Known Member
I find this link in his signature hilarious considering the context of this thread. Does intellectual honesty include slinging insults? I'm surprised his posts haven't been reported to a moderator for flaming....
http://en.wikipedia.org/wiki/Intellectual_honesty
Why not try posting some data that make use of modern cobs. You keep posting comparisons to LED tech that isn't relevant for most of us. Repeatedly posting 'you're wrong' without a valid comparison is a very poorly structured argument.
http://en.wikipedia.org/wiki/Intellectual_honesty
Why not try posting some data that make use of modern cobs. You keep posting comparisons to LED tech that isn't relevant for most of us. Repeatedly posting 'you're wrong' without a valid comparison is a very poorly structured argument.
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churchhaze
Well-Known Member
I've actually made money shorting CREE in the past, and lost money being long CREE. I currently do not have shares in cree, nor do I think a DIY lamp on a weed forum would cause the price of their shares to rise.
hyroot
Well-Known Member
cree has been up and down a lot the past year. They did go up quite a bit in January and then plummeted. down to $38 a share. They don't give dividend checks like most other corporations do.
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churchhaze
Well-Known Member
Dividends aren't as good as share buy backs imo. A company that gives dividends could just as easily buy back shares to reduce total shares outstanding.
hyroot
Well-Known Member
repurchasing shares lowers stock price. Cree did that last year. Their stock went from $60 a share to $20 a share
its almost like a split. except it doesn't increase your amount of shares.
SupraSPL
Well-Known Member
I have never bought or shorted CREE stock or options or any lighting related stock. Sold a few custom made lamps. Sold plenty of parts for DIY led projects, often at a loss reselling extra parts used for testing at a discount. Also sold used HPS equipment for a loss but I do not make a living selling lighting that is the bottom line. I have no loyalty to any particular design or tech, if something awesome comes out that is better than led or COB, I would recommend it for sure.
bicit
Well-Known Member
Does your G/$ electricity include the cost of running an HVAC system? Or just the cost of running the lamp? Does actual oil content come into play(for concentrate makers) or are we just strictly talking about raw vegetative yield?
Hypothetical, but what if cobs yielded less in flower weight, but yielded higher in concentrate production? I know a lot of the 'shills' in the CMH section of ICMAG are investigating this.
What difference does the size of the lamp make? What difference does it make if there is a 2 watt fan attached? Compared to the giant 100-200w vortex fans most people use? How are these negatives? You should really elaborate since most 'commercial indoor growers' or even 'people concerned with yield' as you put it, typically have ample space.And yeah yeah, you fanboys can build something more efficient with cobs that don't produce as much heat but at a quarter of the wattage need heat sinks larger than a gavita 1kwatter's ballast, and then still need fans on top of it
What if cannopy temps are already at desired levels....? In area's where it's already 100+ that's just adding onto the HVAC bill. I'm pretty sure 90-110* cannopy temps will slow down the rate of photosynthesis.
Why not go talk to a physics professor at a local university. They'll set you straight. Heat is energy period. The unit for BTU is being replaced by the standard SI unit for energy, the Joule. Don't believe me? open up a physics book.
Currently, the LM-70(the amount of time it takes for light levels to drop to 70% of it's rated output) of the bridgelux vero 29 is 50k hours, driven at 1.5x nominal current (125w). Even if it's only half that, that's still 5 YEARS 12/12 cycles and the life cycle perfectly coincides with the rated lifespan of most high quality drivers. Now if we take into account that the LM-70 rating increases if the chips are driven below nominal, we have a very nice picture for anyone who wants a low maintenance light.
We keep shifting points though, one second it's professional large scale indoor grows, next it's greenhouses, then some dude in his basement with a 4x4(which, btw GAVITA doesn't recommend one light in any situation.), back to a university greenhouse. All over the board. To whom does this discussion regard?
Group buy on sending a light out to get tested in an integrating sphere? I think that's our biggest hold up at the moment is the lack of university or standardized testing right now.
churchhaze
Well-Known Member
The cat's fixed.
hyroot
Well-Known Member
ahh dork... I'd expect this from chron or froggy. You have exceled well.with corny jokes.
coughphee.connoiseur
Well-Known Member
11x11 room with 8x8 area Orca reflection , Gavita DE 600-1000 what would be best for supplementing.