Gavita's are they really worth the price ??

[MeGaKiLlErMaN]

I am going to say a 4 cob light is better.

For sure 8 of them

I think that is way to much money for a light bulb that is going to lose its ability much sooner.

An 8 cob could... Put out more light in a 4x4 than a Gavida and be more efficient, but you would have to drive them pretty hard. That would lead to hot spots. You could even water cool them! but if you want to see that look in the LED section

To use the Calculators you need to have Java installed on your computer and extract both

CXB3590DB36V4000K 8 COBS @2.1A ON 1.813 PROFILE HEATSINK
16 SQ.FT. CANOPY 94% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 642.55
Cobs power watts: 604
Total voltage forward: 288
Total lumens: 105066
Total PAR watts assuming 10% loss: 293
Total PPF: 1327.29
PPFD based on canopy area: 892.93
PAR watts per sq.ft.: 18.31
Cob efficiency: 53.85%
Power watts per sq.ft.: 37.75
Voltage forward per cob: 35.97
Lumens per watt: 173.95
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 279
umol/s/W / CRI: 4.53 / 70CRI
Heatsink length passive cooling @120cm^2/heatwatt: 332 inches
Heatsink length active cooling @40cm^2/heatwatt: 111 inches
COB cost dollar per PAR watt: $1.37
Electric cost @12/12 in 30 days: $30.57
Electric cost @18/6 in 30 days: $45.61
Cost per cob: $50.17
Heatsink cost per inch cut: $0.66
Total cobs cost: $401

Total heatsink passive cooling cost: $219
Total heatsink active cooling cost: $73

 

[kelly1376]

Same quality but they are denser and weigh more. You grow more I've not seen less than 1.2 per watt



So you would still be happy paying more for less? 1000W for 808PPFD. That's 30 less than an LED setup running at 800W. If you enjoy paying for electricity bills Go for it. Also the reflectors were mentioned in the pdf of par output.. You get PPFD by adding up all the PPF marks and then dividing by that number.

I can see advantages of both. For growing bigger plants if you can get an even distribution over your area with a point source light from 3 feet away it might be worth the 200 extra watts due to better penetration. However, I think even distribution in most cases is severely under-rated. Ive seen a couple of grow logs people getting 3 pounds per light from Fluence spydrx plus. The Spydr is the ultimate in even distribution. ~900 even PPFD over a 4 x 4 area - but only 6-8 inches away from the canopy. One guy ran one head to head against a gavita growing trees. The Spydr was ahead early on but as the plants got bigger the gavitas better penetration showed up big time.

So if growing trees I'd go with the gavita. In most cases though I think more light sources are better. The way people are putting cobs together running 1 cob per 1 or 2 square feet I think if you put any light type together like that you're gonna get awesome results because the distribution is so much better than traditional lighting. I know some of these big warehouses are switching out 1000 HPS with 3 x 315 CMH. They're getting better results but I have to wonder how much of that is due to better distribution of light (from more light sources over a given area) and not necessarily better light source.

 

[Uberknot]

An 8 cob could... Put out more light in a 4x4 than a Gavida and be more efficient, but you would have to drive them pretty hard. That would lead to hot spots. You could even water cool them! but if you want to see that look in the LED section

To use the Calculators you need to have Java installed on your computer and extract both

CXB3590DB36V4000K 8 COBS @2.1A ON 1.813 PROFILE HEATSINK
16 SQ.FT. CANOPY 94% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 642.55
Cobs power watts: 604
Total voltage forward: 288
Total lumens: 105066
Total PAR watts assuming 10% loss: 293
Total PPF: 1327.29
PPFD based on canopy area: 892.93
PAR watts per sq.ft.: 18.31
Cob efficiency: 53.85%
Power watts per sq.ft.: 37.75
Voltage forward per cob: 35.97
Lumens per watt: 173.95
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 279
umol/s/W / CRI: 4.53 / 70CRI
Heatsink length passive cooling @120cm^2/heatwatt: 332 inches
Heatsink length active cooling @40cm^2/heatwatt: 111 inches
COB cost dollar per PAR watt: $1.37
Electric cost @12/12 in 30 days: $30.57
Electric cost @18/6 in 30 days: $45.61
Cost per cob: $50.17
Heatsink cost per inch cut: $0.66
Total cobs cost: $401

Total heatsink passive cooling cost: $219
Total heatsink active cooling cost: $73

I wonder how 4 of the new 200 watt cree's will do? was that calculation with any lenses or reflectors?
And I believe Cob prices are dropping pretty fast atm. See them selling for less than $50 easy.

 

[a mongo frog]

An 8 cob could... Put out more light in a 4x4 than a Gavida and be more efficient, but you would have to drive them pretty hard. That would lead to hot spots. You could even water cool them! but if you want to see that look in the LED section

To use the Calculators you need to have Java installed on your computer and extract both

CXB3590DB36V4000K 8 COBS @2.1A ON 1.813 PROFILE HEATSINK
16 SQ.FT. CANOPY 94% EFFICIENT DRIVER @13 CENTS PER KWH
Total power watts at the wall: 642.55
Cobs power watts: 604
Total voltage forward: 288
Total lumens: 105066
Total PAR watts assuming 10% loss: 293
Total PPF: 1327.29
PPFD based on canopy area: 892.93
PAR watts per sq.ft.: 18.31
Cob efficiency: 53.85%
Power watts per sq.ft.: 37.75
Voltage forward per cob: 35.97

Lumens per watt: 173.95
Heatsink riser thickness / number of fins / fin's length: 0.3in/6/0.95in
Heatsink area per inch: 100.94 cm^2
Total heat watts: 279
umol/s/W / CRI: 4.53 / 70CRI
Heatsink length passive cooling @120cm^2/heatwatt: 332 inches
Heatsink length active cooling @40cm^2/heatwatt: 111 inches
COB cost dollar per PAR watt: $1.37
Electric cost @12/12 in 30 days: $30.57
Electric cost @18/6 in 30 days: $45.61
Cost per cob: $50.17
Heatsink cost per inch cut: $0.66
Total cobs cost: $401

Total heatsink passive cooling cost: $219
Total heatsink active cooling cost: $73

Not sure what your getting at, but no one is running their DE's in a 4x4 foot print. I mean all your calculations i guess to most look real good and their are a few guys running those numbers here on this site. I don't think their hitting the yields your talking about. Their bad ass gardeners but their not all paper work and math. They know "hey i got a garden on my hands, how am i going to get there?" So much you left out that would get any lamp to do what your suggesting. Those are just my thoughts I dig the conversation you doing in here, thanks.

 

[genuity]

I can see advantages of both. For growing bigger plants if you can get an even distribution over your area with a point source light from 3 feet away it might be worth the 200 extra watts due to better penetration. However, I think even distribution in most cases is severely under-rated. Ive seen a couple of grow logs people getting 3 pounds per light from Fluence spydrx plus. The Spydr is the ultimate in even distribution. ~900 even PPFD over a 4 x 4 area - but only 6-8 inches away from the canopy. One guy ran one head to head against a gavita growing trees. The Spydr was ahead early on but as the plants got bigger the gavitas better penetration showed up big time.

So if growing trees I'd go with the gavita. In most cases though I think more light sources are better. The way people are putting cobs together running 1 cob per 1 or 2 square feet I think if you put any light type together like that you're gonna get awesome results because the distribution is so much better than traditional lighting. I know some of these big warehouses are switching out 1000 HPS with 3 x 315 CMH. They're getting better results but I have to wonder how much of that is due to better distribution of light (from more light sources over a given area) and not necessarily better light source.

They are a better light source + the distribution...315lec

1 hood has DE 630 lec & the other has 1000 DE dimmed to 600...
Both cover a 5x6 or 4x6 perfect...

 

[MeGaKiLlErMaN]

Yeah but

They are a better light source + the distribution...315lec
View attachment 3772736
1 hood has DE 630 lec & the other has 1000 DE dimmed to 600...
Both cover a 5x6 or 4x6 perfect...

it takes so many to cover an area but they do put out good par about the same as cobs... But only for a 2.5x2.5ft area. Not a good usage of money seeing how much they are.

Not sure what your getting at, but no one is running their DE's in a 4x4 foot print. I mean all your calculations i guess to most look real good and their are a few guys running those numbers here on this site. I don't think their hitting the yields your talking about. Their bad ass gardeners but their not all paper work and math. They know "hey i got a garden on my hands, how am i going to get there?" So much you left out that would get any lamp to do what your suggesting. Those are just my thoughts I dig the conversation you doing in here, thanks.

Agreed, but it's also about how much you want to pay for it per month, if someone can afford a Gaveda they can afford a DIY cob. And it will cost less monthly by a good deal including cooling.IMO I think the penetration mindsets goes away when people remove the leaves at the bottom because
Cobs can penetrate... Monos not so much.

 

[kelly1376]

They are a better light source + the distribution...315lec
View attachment 3772736
1 hood has DE 630 lec & the other has 1000 DE dimmed to 600...
Both cover a 5x6 or 4x6 perfect...

Nice setup! Do you notice better results with the plants under the 630? This guy over on IC did some tests on the phantom and cycloptics CMH hoods and they look pretty impressive in a 3 x 3 for 315 watts:

https://www.icmag.com/ic/showthread.php?t=327419

Also are you using the gavita 600/750 DE ballast? I hear that 630 can be used with gavita 600 but growers house says it's incompatible.

 

[genuity]

2 315 lec over a 7x3.5.....I was going to add another one in the middle, but they look to be doing ok..

& them new 630 DE will run just fine on galaxy ballast & the galaxy grow amp..
I'm definitely flipping my lights out...badass bulbs,very well built.

 

[MeGaKiLlErMaN]

Yeah but

They are a better light source + the distribution...315lec
View attachment 3772736
1 hood has DE 630 lec & the other has 1000 DE dimmed to 600...
Both cover a 5x6 or 4x6 perfect...

it takes so many to cover an area but they do put out good par about the same as cobs...

But only for a 2.5x2.5ft area per 315LEC

Not a good usage of money seeing how much they are.

Not sure what your getting at, but no one is running their DE's in a 4x4 foot print. I mean all your calculations i guess to most look real good and their are a few guys running those numbers here on this site. I don't think their hitting the yields your talking about. Their bad ass gardeners but their not all paper work and math. They know "hey i got a garden on my hands, how am i going to get there?" So much you left out that would get any lamp to do what your suggesting. Those are just my thoughts I dig the conversation you doing in here, thanks.

Agreed, but it's also about how much you want to pay for it per month, if someone can afford a Gaveda they can afford a DIY cob. And it will cost less monthly by a good deal including cooling.IMO I think the penetration mindsets goes away when people remove the leaves at the bottom because
Cobs can penetrate... Monos not so much.

 

[genuity]

Nice setup! Do you notice better results with the plants under the 630? This guy over on IC did some tests on the phantom and cycloptics CMH hoods and they look pretty impressive in a 3 x 3 for 315 watts:

https://www.icmag.com/ic/showthread.php?t=327419

Also are you using the gavita 600/750 DE ballast? I hear that 630 can be used with gavita 600 but growers house says it's incompatible.

First run with the 630,but been running the 315's for a bit..

With the 315lec, I was able to see more colors come out in the plants...+1
With the 315lec,I was able to get a more robust smelling plants...+1
With multiple 315lec,the coverage expansion was great (obviously)..+1

I can only imagine the 600 DE lec will do the same...

 

[a mongo frog]

IMO I think the penetration mindsets goes away when people remove the leaves at the bottom because
Cobs can penetrate...

From the looks of the journals I agree, I mean look at what the sixstrings is fucking doing!!!! Dudes growing what looks to be fucking monsters under cobs.

 

[Uberknot]

Anyhow what I see here mostly is more power consumption for less light..if that floats yer boat more " power " to ya!

 

[sixstring2112]

I think the whole penetration argument is a wash because gavitas need to be hung high and cobs can be very close to the canopy. I can say in my garden im seeing much more light on the floor under the cob plants then i see under my other plants.i thought it might be from the whiter color but i think after taking some readings with my lux meter its just brighter because theres more points of light

 

[Uberknot]

I think the whole penetration argument is a wash because gavitas need to be hung high and cobs can be very close to the canopy. I can say in my garden im seeing much more light on the floor under the cob plants then i see under my other plants.i thought it might be from the whiter color but i think after taking some readings with my lux meter its just brighter because theres more points of light

I know I get about 78,000 lux at 1750 mA (210w) 24 inches with my 4 cob light....that's pretty good I think.

of course I don't run it that high in such a small space.

at 875 mA it's around 38,000 lux (105w)

 

[a mongo frog]

but it's also about how much you want to pay for it per month, if someone can afford a Gaveda they can afford a DIY cob.

Pay for what per month? I just don't get the your better then me talk because one pay less electricity, hahaha........ I never understood, especially when at any given moment any lamp can out yield any lamp. Who knows what the fuck happens during someones grow.

 

[a mongo frog]

Anyhow what I see here mostly is more power consumption for less light..if that floats yer boat more " power " to ya!

Like this ^^^^^^. This guys better then everyone else and is willing to say like some would say smart ass "more power to ya" Like were a bunch of idiot fucks who run tons of DE's and SE's and soon to be cob kits cuz we are broke dumb fucks...... I just never understood that kind of better then you type thinking.

 

[Uberknot]

Like this ^^^^^^. This guys better then everyone else and is willing to say like some would say smart ass "more power to ya" Like were a bunch of idiot fucks who run tons of DE's and SE's and soon to be cob kits cuz we are broke dumb fucks...... I just never understood that kind of better then you type thinking.

In the end COB's will take over....they are just that good.in many ways.

Less power for more is better anyways you look at it.

 

[sixstring2112]

Just when everyone thought the hps bulb could not be any better gavita came along with de tech (or phillips)
Im betting since they have unlimited research money now we will see another jump in tech with de lamps very soon

 

[genuity]

In the end COB's will take over....they are just that good.in many ways.

Less power for more is better anyways you look at it.

Well I do not plan to be growing that long-term.....so before the end (whatever that is)

 

[MeGaKiLlErMaN]

Pay for what per month? I just don't get the your better then me talk because one pay less electricity, hahaha........ I never understood, especially when at any given moment any lamp can out yield any lamp. Who knows what the fuck happens during someones grow.

Well it's all about how much you want to pay for the same output bro. I don't think I'm better I think I'm giving proper information layer out as plainly as possible. Take AC and the lack of efficiency and there's wasted money per month.