All BS set aside CMH yields

is it true or not

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ttystikk

ttystikk

Well-Known Member
swagslayer420 said:
Thank you!!!!! @genuity..... people love to troll on here and don't own and test gear, how he keep typing and I am looking at led cobs in gorilla tent and DE in the other and see whats going on for my own eyes and the comparison of each plant, DE Produces the biggest nugs i've ever seen.
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My 860CDM lamps have made both the biggest nugs and the biggest yielding plant I've ever grown, but I'm not harboring many doubts about the ability of my COB LED modules to best their performance.

My reasoning is dead simple; instead of attempting to match the performance of my current lighting setup and taking the savings in electrical efficiency, I opted instead to hold power consumption (relatively) constant and take the entire performance improvement in additional PPfD.

In addition to drastically improved irradiance, the light will be very well distributed across the canopy. By contrast, my thread is thirty-five pages of various shenanigans all designed to improve light distribution on my canopy using HID lighting, with decidedly mixed success.

There will not be a marked improvement in spectrum between my 860CDM and the new CXB3590, but there would be if I were switching from HPS.
 
febisfebi

febisfebi

Well-Known Member
ttystikk said:
My 860CDM lamps have made both the biggest nugs and the biggest yielding plant I've ever grown, but I'm not harboring many doubts about the ability of my COB LED modules to best their performance.

My reasoning is dead simple; instead of attempting to match the performance of my current lighting setup and taking the savings in electrical efficiency, I opted instead to hold power consumption (relatively) constant and take the entire performance improvement in additional PPfD.

In addition to drastically improved irradiance, the light will be very well distributed across the canopy. By contrast, my thread is thirty-five pages of various shenanigans all designed to improve light distribution on my canopy using HID lighting, with decidedly mixed success.

There will not be a marked improvement in spectrum between my 860CDM and the new CXB3590, but there would be if I were switching from HPS.
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do you think the 860's flower well enough to compete with DE?
 
TheChemist77

TheChemist77

Well-Known Member
Sativied said:
I think that is another good addition to the available options for lighting, one I've been considering for a while. Run the cmh for veg (on 4x4') and switch on the leds during flower. Still get the temps I want without additional climate control, more control over spectrum. Mixing mh or cmh with hps uniformly is not doable with just a couple of bulbs, while hid combined with led allows for more control (those leds ideally cover the 4x4 uniformly as well as the cmh, so they overlap entirely, instead of having cmh in the center and growing under led along the edges).
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hey sativied, i switched over as u know from runnoing 2 600 watt hps to 2 315's and now 3 315 cmh lamps in the same area.. my hps's wer in cool tubes w/ 6 inch duct pulling the heat out, the 315's are all open hoods so im getting better light as there is no glass between the bulb and my canopy..but anyways my point was about heat,,,the 3 315's w/ open hoods produce less heat than 1 600 watt hps.. i still have an intake and exaughst but since the lamp switch i no longer use the one 6 inch exaughst hole and duct that was used to pull the heat from the cool tubes out.. my next run that begins jan 1st ill be running 1 1,000watt hps in a cool tube and ill be using that exaughst once again...but after that run(its purely a test comparing 945 watts cmh vs 1k watts hps over same area,same clones,temps etc..)ill be going back to cmh and ill no longer need it again...so anyways the 315's are much cooler than hps so if someone has heat problems cmh may be a good option...
 
ttystikk

ttystikk

Well-Known Member
febisfebi said:
do you think the 860's flower well enough to compete with DE?
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No, for lots of reasons- the 860 designation being only the first.

Also, higher Kelvin (bluer) light sources tend not to produce as much PPfD per watt than redder ones, it's all about the energy per photon at different wavelengths and the number of photons emitted.

Finally, the ballast in a DE setup is a far superior piece of equipment than the magnetic ballast driving the 860CDM.

I'm growing tasty flowers but I'm definitely not saving any power doing it.
 
TheChemist77

TheChemist77

Well-Known Member
ttystikk said:
No, for lots of reasons- the 860 designation being only the first.

Also, higher Kelvin (bluer) light sources tend not to produce as much PPfD per watt than redder ones, it's all about the energy per photon at different wavelengths and the number of photons emitted.

Finally, the ballast in a DE setup is a far superior piece of equipment than the magnetic ballast driving the 860CDM.

I'm growing tasty flowers but I'm definitely not saving any power doing it.
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hey ty, i know your all about cob lighting, however have you considered switching to a couple 315 watt cmh to replace the 860? you said it yourself the 315's are more efficient
 
ttystikk

ttystikk

Well-Known Member
TheChemist77 said:
hey ty, i know your all about cob lighting, however have you considered switching to a couple 315 watt cmh to replace the 860? you said it yourself the 315's are more efficient
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I did say that and it's true. I was going to go that way, even bought a dozen 315W CMH kits to do it with... and then I realized that I was going to need so many lamps I wouldn't be able to fit them all inside my rack! Worse, even if I could I'd be running so many so close together that I'd be wasting too much light on adjacent light bulbs.

COB LED is the answer to my dilemma, and it solves so many more problems besides that one that I just couldn't pass them up.

Those kits are just sitting around, gathering dust.
 
a mongo frog

a mongo frog

Well-Known Member
ttystikk said:
I did say that and it's true. I was going to go that way, even bought a dozen 315W CMH kits to do it with... and then I realized that I was going to need so many lamps I wouldn't be able to fit them all inside my rack! Worse, even if I could I'd be running so many so close together that I'd be wasting too much light on adjacent light bulbs.

COB LED is the answer to my dilemma, and it solves so many more problems besides that one that I just couldn't pass them up.

Those kits are just sitting around, gathering dust.
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What does one exactly do with the kits? Mount them in a reflector?
 
ttystikk

ttystikk

Well-Known Member
a mongo frog said:
I wasn't saying that. Just looking for info on them. Is this what we are talking about?
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The kit itself is just the Philips ballast and 315W CMH lamp with mogul socket base. BYO socket or fixture.

The kit you're referring to is not the Philips ballast, and uses a conversion base to allow the twin pin base to screw into reflectors. My lamps don't need one.
 
febisfebi

febisfebi

Well-Known Member
Greengenes707 said:
I won't be making it, but I have been asked recently about the concepts. To me it's over kill and/or a waste with big sodiums.
It may have a place with a 315 LEC and then a COB pontoon setup to get you to ~700w over an area. Maybe even high CRI pontoons.

For me cobs give the horse power, and great quality. But if trying to squeeze more out of them...toss some UVB on them.

You want something like this(uvb saddle) but with cobs...
View attachment 3570789
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That is my plan, but I am hoping to find an led solution that does not need to be replace every 600 hours :)
 
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febisfebi

febisfebi

Well-Known Member
swagslayer420 said:
Thank you!!!!! @genuity..... people love to troll on here and don't own and test gear, how he keep typing and I am looking at led cobs in gorilla tent and DE in the other and see whats going on for my own eyes and the comparison of each plant, DE Produces the biggest nugs i've ever seen.
Click to expand...
I am not trolling, in order to talk shit to anyone. I have not personally owned the ac/de cooled hood, but I do use DE tech, and I spent just as much time researching all the available setups before deciding on something, and wanted to share what I found out. I have seen them in stores, I have talked to experts in detail about them, and everyone who has any experience or knowledge about DE tech has warned me severely against using any type of cooled hoood for DE. DE is for commercial greehhouses/warehouses, where you have lots of ceiling height. Personally I have height just enough to make it practical. I actually had many people discourage its use for small scale ops, but they didnt assume i had a few more feet of height than most.
@genuity I beleive you when you say you are using that hood it as sun system suggests, at 36" but that should tell you right there, that your not going to get even coverage over 21 sq ft, which btw only the gavita reflector, and other focal's are rated for.
Since its at 36" you will never get this kind of spread, and since the reflector is designed for that height, it focuses the beam straight down, which like I said is why they are boasting higher par numbers than open hoods.
I dont want to argue about it, I am only trying to help you get the most from your lights, honestly. Personally I could care less if anyone wants to use a cooled hood, with de lights. thats on them.
 
TheChemist77

TheChemist77

Well-Known Member
ttystikk said:
I did say that and it's true. I was going to go that way, even bought a dozen 315W CMH kits to do it with... and then I realized that I was going to need so many lamps I wouldn't be able to fit them all inside my rack! Worse, even if I could I'd be running so many so close together that I'd be wasting too much light on adjacent light bulbs.

COB LED is the answer to my dilemma, and it solves so many more problems besides that one that I just couldn't pass them up.

Those kits are just sitting around, gathering dust.
Click to expand...
damn that sucks, lots of money wasted huh? your plan was to hang them vertically with no reflector i take it..a dozen,,, damn,, you could run a huge area with that many.. my thoughts are the more cmh you run the better the efficiency..12 315's would be perfect over 4 4ftx8ft tables and i bet would blow any hps run away. . cant you use them at your work place? or has the work place all cob light testing? i thought you had said you worked at a gro op or somthing to that nature...im sure youll find some people to buy them as it seems more and more people are realizing the cmh potential..grow well n be well, good luck..
 
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