a mongo frog
Well-Known Member
Can you show us the test results? That would be neat. Thanks.
LEC - Light-Emitting Ceramic
- Thread starter potroastV2
- Start date
THCbreeder
Well-Known Member
Sure send me a spectrometer that's reliable and I'll post the results of 12-18-24 inches
a mongo frog
Well-Known Member
Oh you said that led produces higher thc and more terpenes. Just wanted to see your lab results you had done.
dbkick
Well-Known Member
Dunno, are the hydrofarm made somewhere other than where they make cheap chinese ballasts?
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THCbreeder
Well-Known Member
greengenes did a test on leds comparef 1000w hps . Terpenes were def higher and thc was as well . YouTube blue dream lab results greengenes ... You'll see his results . I'm not set up to run clones grown side by side and or have a lab I can send to . Cobs are one spectrum , and I haven't seen a side by side of cmh and LEDs . However the benefit of dual spectrum has to have a play In that I'd believe . But choose what you want mongo
Astro Aquanaut
Active Member
Going to need more than a spectrometer, going to need a Chromatograph...
Looks, and feels won't cut it...
I believe Berfelo on youtube has already shown that terpene production is more or it brings out terpenes which the HPS doesn't... Yeild per a watt on the LED's is obviously higher due to efficiency, however the lack of UVB is pointing to similar THC levels as HPS...
So, if Terpenes, and Phenols go through a photochemical or electromagnetic process to create THC then it wouldn't be far fetched to think LED+UVB may produce better buds. If you can pull 1.5gpw off of LEC then what is the push to 1.7 or 2 gpw on a LED...
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Astro Aquanaut
Active Member
By the way Berfelo is using a SRI 8610C GC they are not super expensive... need fid/tcd...
THCbreeder
Well-Known Member
Well I just need someone to send me everything required for the cmh 630 and I'll tape my tent and give you the numbers !!!
Astro Aquanaut
Active Member
Do you have a PAR meter, would be awesome to get the par readings off of it for a 4x4... Because I don't believe anyone has posted that yet... They cost 35 bucks for an el cheapo..
THCbreeder
Well-Known Member
I don't know shit about any of the light reading equipment .
Bad Karma
Well-Known Member
Where have you seen a $35 PAR meter? The cheapest I've been able to find is the one by Hydrofarm for around $140-150.
BiG PuFFer
Well-Known Member
I did, but i didnt take the readings and they seem low.
ttystikk
Well-Known Member
I have a 200W (225W actual) COB LED fixture I'd LOVE to throw into a head to head with a 315W CMH setup. It's only 60% efficient, but I bet they'd produce similar results.
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ttystikk
Well-Known Member
Comparison runs vs HPS are going to have markedly different outcomes than those run against 315W CMH, to the point of irrelevance in terms of terpene profiles.
loftygoals
Well-Known Member
That's a lux meter not a par meter. There's a difference... lux is effectively light available in the human visual spectrum while par is light available to plants for photosynthesis. I'm not going to bother explaining subtleties but they are not the same.
ttystikk
Well-Known Member
Having read quite a few of your posts, I can tell you know your way around electrical equipment pretty well.
The efficiency advance of 315W CMH is not in the bulb. The essential thing for this system is that the ballast delivers a low frequency square wave output. The Philips unit certainly does and Welthink likely does, but doubts have been cast on others including the Hydrofarm unit.
Someone competent (hint, hint! ) should throw all these units on an oscilloscope and verify that the ballasts work as promised.
Astro Aquanaut
Active Member
I am betting on terpenes will be higher and yeild, however CMH will have higher THC gotta have it tested though... LED Smokes HPS... Put me down for a .3 to .5 gram per a watt difference, and 1-2 new terpenes plus 10-20% more...
I am betting on a spread... THC 2-3% higher for CMH where is my bookie 
I believe LED is the way to go with some UVB introduced... Am going to end up buying some UVB lights and testing the UV index at different distances, so I can get my new build figured... Going to attempt 42x3590's and then get a uv index measure on 2x54 watt arcadia bulbs vs 2x40 watt phillips to decide where am going to go... I am going to just put 2xUVB bulbs between every row of 7 cob's. I like MAU5 grow mouse au's setup, however those freaken heatsinks are expensive as hell. Going with 5² and 58" long heatsinks w/ 7 cobs per a heatsink. I still believe you can tap in a bunch of mono's(620-630) in pattern along the heat sink to provide more reds...
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PSUAGRO.
Well-Known Member
PRC====== People's Republic of China
VTMi'kmaq
Well-Known Member
So in the legal states are there meds available grown strictly with cmh lights as oppossed to reg mag hps or mh? All the technical jargon is wonderful but for me id have to try the final product.