Spectrum king led
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BobCajun
Well-Known Member
SK didn't purposely design a plant growth spectrum. That mixture of LEDs is what Cree calls True White technology. They added a few reds and ambers to 4000k whites for better color rendering. It only brings the CCT down slightly to 3700 something. The ambers are pretty much a waste of power for plant growth, for instance, which proves SK didn't purposely design a plant growth spectrum. They will certainly work, just that they cost about 50% more than CXB COBs. Why pay 50% more for the same light output? They don't have 400w COB high bays yet but they do have 240w ones, and they're much more compact and lightweight. Not saying you made a mistake buying SKs. If you're okay with the price then you're a satisfied customer. Personally, I found that the 240w ones are just right for a 1.5'x3' cabinet. They're also a lot better without the reflectors than with, placed closer, meaning where the bottom of the reflector was before is where the actual COBs are now.
Djloud
Active Member
These are at 4 weeks all sk. I can pull almost 2 units per light. I dont care what was perposly done the plants love the spectrum and the plants speek for themselves. 120000 lumens at 18 inches with a full spectrum. And it rocks a 4×4.
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Djloud
Active Member
Oh yea there is no such thing as a 240w sk. I run the 400+. They can run on 240 volts if thats what u was referring too
BobCajun
Well-Known Member
Yeah I know LEDs work well, just saying that SKs aren't the best value in LED lighting now that CXBs are available. BTW they don't have far red or UV so it's not really full spectrum. Should at least have UV-A for high phenolics production, since phenolics combine with plastids in the trichomes to produce THC. I supplemented my high bays with a couple blacklight CFLs for UV-A.
BobCajun
Well-Known Member
I said 240w CXB high bays, not SK. Search "240w cxb high bay" and you'll find them.
Djloud
Active Member
Yes there is uv just from the whites. And there is some ir too so yes it is full spectrum. Its a 94 cri the only thing with a better spectrum is the sun which is 100 cri
Djloud
Active Member
A
oh yea and without the uv it would not produce the trics it does. These light produce more frost than ive ever seen
Psyphish
Well-Known Member
Frost isn't always an indicator of.. anything really. A cheap "150w" industrial COB light I used in my micro projects made everything ridiculously frosty, but the buds were never as potent as the ones grown under the 315w GreenPowers.
Even the 80w Hans panels made really frosty buds, but they were always skinnier and less potent than the CDM buds.
I agree that white high efficiency COBs are among the best possible grow lights though, just not feeling the purple/pink fixtures.
Even the 80w Hans panels made really frosty buds, but they were always skinnier and less potent than the CDM buds.
I agree that white high efficiency COBs are among the best possible grow lights though, just not feeling the purple/pink fixtures.
Djloud
Active Member
Yea i hate the purple pink fixtures. All i was saying is sk is a full spectrum. Look at the spectral readout on the sk. Thats is as close to full spectrum than any other grow light
Djloud
Active Member
Actually i think bml has a full spectrum. I guarantee it dont have the intensity as the sk thou
OLD MOTHER SATIVA
Well-Known Member
hey dude..yes you came on the other forum where i mentioned not having good followering success with my sk400+as in here..you just signed up
i sense "damage control"
i seriously have my doubts as to how advanced your plants were..i was gonna shut up but its too glaring
they are quoted at 4 wks...sorry.. i just find that photo un believable
and i am prepared to be an led newbie[which i am not]
but i have seen apile of flowered plants at 4 wks ovee the last 4 decades
and none of ever looked that done..
my overly tiny budded plants did have 10 x the resin content i see on your photos though
not that your resin production looks bad
i think sk400+ has plenty of power ...it penetrated well just not the right spectrum imho
i flowered at18"
and it was done in the same room as the same clones under raptors/1kw hps
the hps colas were decent enough..
its not that i was great..its just that this was a side by side grow..and its not my first time growing..
the photo does at least show i have "some "skill..and the plant was NOT at 4wks here ..lol
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BobCajun
Well-Known Member
Actually there are no UV or IR LEDs in SKs. They had a test results document on their site before and it specified what LEDs were in it. There were mostly 4000k white with a few deep reds and photo reds and a few ambers. That's it. They were designed for use in high bays so why would they add UV and IR? It's not a custom LED panel. It's stock "True White". Growmau5 copied the document in the first post on page 4 of this thread. BTW, notice it says it has an inrush current of 10.76 amps. That's why you need separate timers for each one or you could have fire issues. That much current spikes when an SK starts up.
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Forget about the heated debates.
please tell us about this sativa babe!
genetics ? age ? type of high?
OLD MOTHER SATIVA
Well-Known Member
chemo x dalat[viet]..made by kushyman 2003
i kept this more indica pheno type because it stretched less .yielded a kilo ..it was good stuff..
i should have kept the more sativa pheno type..because it was more soaring
i am finally regrowing seeds from that cross now and will select the most "high" sativa pheno
also first time trying the chemo dalat x chemo..i have three going ..they are shorter
we will see what they throw out
that one was prob10-11 wks
thanks
i kept this more indica pheno type because it stretched less .yielded a kilo ..it was good stuff..
i should have kept the more sativa pheno type..because it was more soaring
i am finally regrowing seeds from that cross now and will select the most "high" sativa pheno
also first time trying the chemo dalat x chemo..i have three going ..they are shorter
we will see what they throw out
that one was prob10-11 wks
thanks
Djloud
Active Member
Believe what u want. I dont have any reason to lie and what the fuck do u mean by damage control. I took them pics at day 28. Dont call me a liar just because u cant produce results like that. Sk for the win. Take off the tin foil hat this is just plants
Djloud
Active Member
Ill show u pics when week 8 comes around. The buds will be double in size. U cant argue with results. And again lose the tin foil hat
Stephenj37826
Well-Known Member
Are you counting 28 days from switch to 12/12?
Djloud
Active Member
I have a problem with your pic. I see at least 4 discreet light spots indicating at least 4 lights, yet you are describing 1 SK per 4x4. The pics are also showing a very dominant yellow orange cast that's more like an HPS, but that could be just poor white balance. Flowers also look more like 6 weeks.
I'm not sayin SKs are a bad light, but you sound like a cheesy SK ad, that's just as badly done as the SK website.