rkymtnman
Well-Known Member
i'm just trying to get my lights to as closely mimic sunlight as possible. that's my goal.
320w QB or 315 CMH
- Thread starter No1up
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rkymtnman
Well-Known Member
retailmenot.comDo you guys have any coupons for growers lights?
wietefras
Well-Known Member
The point is, you are not following actual scientists. You simply cobbled two claims together:
1) Scientists have show that with a lot of UV light there is a small increase in THC.
2) CMH and MH lights emit a tiny fraction of their light as UV.
UV is not a binary thing. It's not "there or not". The effect is proportional to the amount of UV. "Science" has shown that you need a lot of UV for a significant effect on THC. So 2 does not follow from 1 simply because there is a minimal amount of UV leaking from (C)MH bulbs.
The only person here with believable UV results would be Kite High. He produced lab tests giving the UV side 23% vs the non-UV side only 21%. Not sure that's worth the bother, but ok. Even he said that CMH does not produce enough UV.
Another thing is that usually with application of UV, the yield goes down. So then you'd possibly end up with less THC overall. 21% 500g would be more total THC than 23% of 450g.
Taking that even further, who's to say you wouldn't produce more THC in total if you simply apply the power otherwise consumed by the extra UV bulbs to regular PAR light and prop up the production of the plants overall?
That makes even less sense.
rkymtnman
Well-Known Member
what level uv light did they test at and what is considered alot vs not so much?
if they can give you a sunburn from a brief exposure, that's plenty in my book.
really? how so? the sun is the best grow light on this planet bar none.
wietefras
Well-Known Member
400uw/cm2
Well that's scientific yes.
It is not. We use warm white lights because that's superior. No indoor grower uses 5500K lights to flower their cannabis. That kind of blue light is only good for growing greens. Not for flowering fruits/flowers.
No1up
Active Member
Ok fellas I think I'm going to pull the trigger on the 320qb. You guys make a lot of sense and I can't see this light as a bad purchase. So even though a few have already stated that the 320 with the mixed diode would work fine in a 3x3 I want to double check. You guys think it' good? Or should I exchange my tent.
Humple
Well-Known Member
A 3x3 will be fine. Best of luck!
Budies 101
Well-Known Member
Depends, what starin are your seeds?
My lights take about 10 min to build, I assume it's about the same with QB's. Main thing is you need to make sure to hook it up right to the driver when doing more than 1 board. They will have instructions I'm sure that should make it super easy pants.
Budzbuddha
Well-Known Member
Hang BOTH at same height .... You will be fine in a 3x3.
1. Run the 4000k at seedling / veg ( it has a bluer spectrum)
2. As soon as pistils pop kick in the other panel .
3. Run both thru harvest.
Or
Run both from start to finish. ( 20/4 , 18/6 )
Reach out to @robincnn @Stephenj37826
For more solutions
1. Run the 4000k at seedling / veg ( it has a bluer spectrum)
2. As soon as pistils pop kick in the other panel .
3. Run both thru harvest.
Or
Run both from start to finish. ( 20/4 , 18/6 )
Reach out to @robincnn @Stephenj37826
For more solutions
No1up
Active Member
Final question before I confirm purchase. and again fellas, thank you for all your input, insight, and guidance. If any of you are ever in south texas I dinner is on me!
So the 260 has the regular configuration and it says it's ok for a 3x3. The XW configuration is also good for 3x3. Is there any reason to go with one over the other?
So the 260 has the regular configuration and it says it's ok for a 3x3. The XW configuration is also good for 3x3. Is there any reason to go with one over the other?
nfhiggs
Well-Known Member
But ... Sunlight, in no way resembles the Chloro A and B absorption charts you mentioned in your previous post.
No1up
Active Member
I ended up fully pulling the trigger on the 320qb board since it's the only one with 3k in stock and the added 2700k is cool.
It specifically states the 3000k is 90cri, wondering if other 3000k on the other boards are 90 cri since none of the other kits specifically say anything about that. I'm tapped on budget for now so I'm hoping it' ok for vegging. I do have a China made cob set up that has blue and red. It's supposed to 800w with a 200w draw.. Lol but maybe it's good enough for veg? I'm so wore out worrying about this lighting situation. Kind of glad it's over. I was really stressing to get it right, last thing I need is to drop $500 and find out I could have done better.
It specifically states the 3000k is 90cri, wondering if other 3000k on the other boards are 90 cri since none of the other kits specifically say anything about that. I'm tapped on budget for now so I'm hoping it' ok for vegging. I do have a China made cob set up that has blue and red. It's supposed to 800w with a 200w draw.. Lol but maybe it's good enough for veg? I'm so wore out worrying about this lighting situation. Kind of glad it's over. I was really stressing to get it right, last thing I need is to drop $500 and find out I could have done better.
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rkymtnman
Well-Known Member
i wouldn't say no way. high blue peak, higher red peak. sunlight just doesn't have the dip in the middle nm range.
Humple
Well-Known Member
Don't stress, man. You made a solid purchase, and I'm sure you will be very pleased with the results! I haven't vegged under 90 CRI, but I'm sure some folks here can give you feedback on that.