Gavita's are they really worth the price ??

[MeGaKiLlErMaN]

That's for a 5x5 and that's full spectrum with IR , and lots of FAR RED, something COBs lack not to mention that's a SINGLE ENDED 1000w HPS , DE lights are even higher PAR numbers.

Alright I really not sure where you're getting these "facts" from.... But the standard of measurement is 4x4 and 3x3... Mostly 4x4.

During an unbiased test of all the different High end DE HPS systems they used a 4x4 standard. And according to that the Gavida Pro
1000W DE system puts out a solid...

620 PPFD at 24" in a 4x4

Growers House source:
http://growershouse.com/images/DE_TEST_INFOGRAPHIC.pdf

The sites themselves only ever advertise a 10% increase in PAR from single ended on their site.

You can add far red but its really not that important as many growers have demonstrated. However a red signal does help start flowering sooner. It is true that they do not have IR but when you're pulling 1.2G/W-1.9G/W then who cares? IR does help produce THC since the crystals that they make are like a sun screen for the plant and it does adjust as the IR does... but it produces it naturally anyways making that argument mute.

Again Ill back it up even more once I have my PAR meter.

 

[Yodaweed]

Alright I really not sure where you're getting these "facts" from.... But the standard of measurement is 4x4 and 3x3... Mostly 4x4.

During an unbiased test of all the different High end DE HPS systems they used a 4x4 standard. And according to that the Gavida Pro
1000W DE system puts out a solid...

620 PPFD at 24" in a 4x4

Growers House source:
http://growershouse.com/images/DE_TEST_INFOGRAPHIC.pdf

The sites themselves only ever advertise a 10% increase in PAR from single ended on their site.

You can add far red but its really not that important as many growers have demonstrated. However a red signal does help start flowering sooner. It is true that they do not have IR but when you're pulling 1.2G/W-1.9G/W then who cares? IR does help produce THC since the crystals that they make are like a sun screen for the plant and it does adjust as the IR does... but it produces it naturally anyways making that argument mute.

Again Ill back it up even more once I have my PAR meter.

Duel Ended Gavitas cover a 6x4, so you cut off a good 8 squared feet of coverage :\

 

[a mongo frog]

During an unbiased test of all the different High end DE HPS systems they used a 4x4 standard. And according to that the Gavida Pro
1000W DE system puts out a solid...

620 PPFD at 24" in a 4x4

Thats crazy right? Cuz no one is going to hold their DE at 24 inches. I never understood these ppfd numbers. I mean who tell who whats enough ppfd to grow dank shit and who determines dank shit out side of lab results. Ill get some bull shit but i prefer lumens for humans!!!!!

 

[MeGaKiLlErMaN]

Duel Ended Gavitas cover a 6x4, so you cut off a good 8 squared feet of coverage :\

If the coverage is less than 400 PPF at those edges its better to have it in a 4x4... When you look at the spread and when its at higher heights it trails off even more.

Thats crazy right? Cuz no one is going to hold there DE at 24 inches. I never understood these ppfd numbers. I mean who tell who whats enough ppfd to grow dank shit and who determines dank shit out side of lab results. Ill get some bull shit but i prefer lumens for humans!!!!!

Yeah its not bad... but for the wattage and price point its not good. I run mine at 3 ft because it works for me. but I also have panda film everywhere so only minor losses... To PPFD is average PPF in what ever area youre running ans is the most important think to know for light output levels (Not PPF) When you know your PPFD you know exactly how efficient your plants are photosynthesizing which can help you lock in everything.

My Point Im saying that 800Watts puts out 838PPFD (in a 5x5)with diyleds.

[Which really isnt fair because If I ran this in a 4x4 I would have (1310.44PPFD double for less watts)]

and 1000W puts out 640PPFD ( in a 4x4) in less area.

Seems like a no brainier to me. Not even LECs are as efficient.

 

[a mongo frog]

1000W puts out 640PPFD ( in a 4x4)

At what height though? Like most of us run our SE's at 20 inches or less.

 

[MeGaKiLlErMaN]

At what height though? Like most of us run our SE's at 20 inches or less.

at 24" as stated above.

 

[a mongo frog]

If the coverage is less than 400 PPF at those edges its better to have it in a 4x4... When you look at the spread and when its at higher heights it trails off even more.

Wait, whats your foot print then with DE?

 

[MeGaKiLlErMaN]

Wait, whats your foot print then with DE?

My original was 3 ft above and I got .8G/ room W. I'll be adjusting once I get my par meter most likely.

 

[sixstring2112]

My original was 3 ft above and I got .8G/ room W. I'll be adjusting once I get my par meter most likely.

So i dont think you ever said which meter you are getting

 

[MeGaKiLlErMaN]

So i dont think you ever said which meter you are getting

The cheapest one I could. It's the hydrofarms one with the wide sensor. It works for what I need. And it's margin of error isn't that big

 

[Yodaweed]

If the coverage is less than 400 PPF at those edges its better to have it in a 4x4... When you look at the spread and when its at higher heights it trails off even more.



Yeah its not bad... but for the wattage and price point its not good. I run mine at 3 ft because it works for me. but I also have panda film everywhere so only minor losses... To PPFD is average PPF in what ever area youre running ans is the most important think to know for light output levels (Not PPF) When you know your PPFD you know exactly how efficient your plants are photosynthesizing which can help you lock in everything.

My Point Im saying that 800Watts puts out 838PPFD (in a 5x5)with diyleds.

[Which really isnt fair because If I ran this in a 4x4 I would have (1310.44PPFD double for less watts)]

and 1000W puts out 640PPFD ( in a 4x4) in less area.

Seems like a no brainier to me. Not even LECs are as efficient.

I been planning to do a DIY Citizen COB rig , if you got some info on good building techniques that would be cool I was thinking 4 of the clu048-1818 with one MeanWell HLG-185H-48A Driver
https://cobkits.com/product/meanwell-hlg-185h-48a-driver/
but honestly I have some area 51 leds and a nice all red with cob led and until they die I'm gonna run with them, they are about the equiv of a 600w hps but honestly I like my 600w hps better I been running two right now in a 5x10 but I usually run 3 600w in my 5x10 during winter, I get a good haul from the leds but honestly I think the hps is better. I really need to do a DIY cob light and a legit comparison to my 600w hps grow.

 

[MeGaKiLlErMaN]

I been planning to do a DIY Citizen COB rig , if you got some info on good building techniques that would be cool I was thinking 4 of the clu048-1818 with one MeanWell HLG-185H-48A Driver
https://cobkits.com/product/meanwell-hlg-185h-48a-driver/
but honestly I have some area 51 leds and a nice all red with cob led and until they die I'm gonna run with them, they are about the equiv of a 600w hps but honestly I like my 600w hps better I been running two right now in a 5x10 but I usually run 3 600w in my 5x10 during winter, I get a good haul from the leds but honestly I think the hps is better. I really need to do a DIY cob light and a legit comparison to my 600w hps grow.

My only suggestion is to go passive on the cooling for them, northerngrowlights has some good prices and setups. But I would stay away from the active stuff. To get you better help on the subject I would suggest typing out all your requirements over in the LED section so you have all the people that know more than me helping!

 

[kelly1376]

The cheapest one I could. It's the hydrofarms one with the wide sensor. It works for what I need. And it's margin of error isn't that big

I have that same unit. It seems to do the job well enough

 

[Yodaweed]

My only suggestion is to go passive on the cooling for them, northerngrowlights has some good prices and setups. But I would stay away from the active stuff. To get you better help on the subject I would suggest typing out all your requirements over in the LED section so you have all the people that know more than me helping!

I like the pin heat sinks pretty cool feature, I like these ones https://cobkits.com/product/mechatronics-111mm-pin-fin-heat-sink-for-cree-citizen-vero/ for the citizens .

 

[kelly1376]

Curious if any of you'll have used the gavita small room reflector? It's supposedly a lot better for even PPFD in small areas. Their regular reflector is made for hanging at high heights in big rooms with lots of overlap with other lights. Here are a couple of profiles they have for their small room reflector for use in conjunction with their mammoth G-1 tent with the DE 1000 and 750. The tent is 3'9 x 5'10 x 7'11 tall

 

[Uberknot]

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.

 

[a mongo frog]

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.

When you say better, what does that mean? A 4 or an 8 cob light is better then a DE light? Whats better about it?

 

[Uberknot]

When you say better, what does that mean? A 4 or an 8 cob light is better then a DE light? Whats better about it?

I cannot see buying something that is going to decrease at a rapid rate in quality when I use it.

Pretty much everything If you pump the same watts through cobs you will blow that lamp out of the water.

ON top of that they will last much much longer and be more efficient.

We won't even get into heat and wasted light...lol.

 

[a mongo frog]

Pretty much everything If you pump the same watts through cobs you will blow that lamp out of the water.

You mean your going to produce better buds? Thats not even true bro. And in the very end thats why we garden. Your not aloud to have a 4 chip fixture and a couple 3 week old plants and talk about how your going to blow a DE out of the water.

 

[MeGaKiLlErMaN]

When you say better, what does that mean? A 4 or an 8 cob light is better then a DE light? Whats better about it?

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

Curious if any of you'll have used the gavita small room reflector? It's supposedly a lot better for even PPFD in small areas. Their regular reflector is made for hanging at high heights in big rooms with lots of overlap with other lights. Here are a couple of profiles they have for their small room reflector for use in conjunction with their mammoth G-1 tent with the DE 1000 and 750. The tent is 3'9 x 5'10 x 7'11 tall

View attachment 3772542 View attachment 3772543

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.