Boutta switch to led in my tent

Evil-Mobo

Evil-Mobo

Well-Known Member
Rahz said:
410 PPFD provides pretty robust vegetative growth. I don't think clones will have a penetration problem, but even if vegging larger plants it wouldn't be a bad thing.

As far as veg, I understand your point of view but the whole red/blue thing needs to go the way of the dinosaur. I would be open to some proof that high K led is better for veg than warm white, but on principal alone it doesn't make sense. The whole point of using MH was to boost 450nm. As long as the blue levels are in the 12-15% area it always makes sense to invest the rest of the photons into the band that is more likely to promote a photosynthetic response, 580-680nm. A 6000K emitter provides a lot more blue than is necessary and there is more light dedicated to the 480-580nm band, which doesn't make sense.

Eventually there will be a point where the concept of two different sources for veg and flower is considered history.
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I cannot wait for that day but I just don't think we are there yet, Hence everyone adding the reds and blues to their 3500K builds searching for a "full spectrum" not to mention those adding UV which is already present to one degree or another in the MH/HPS/CMH and even certain temperature T5 bulbs.

To this day my best veg setup has been my 6500K T5 setup. I myself am trying to find a suitable replacement that is more efficient but haven't gotten there yet. The different manufacturers having different spectrums within the same Kelvin temp ratings doesn't help ease all the confusion here either.
 
Jerseykushface

Jerseykushface

Well-Known Member
Rahz said:
Yes, in a 3x3 for veg. The return policy is 45 days but if you're interested I will make an exception and extend it to 90 days with no restocking fee should you choose to return it. The only thing I would ask is that you report your findings, good or bad.
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Really that would b sweet!
 
Rahz

Rahz

Well-Known Member
Evil-Mobo said:
I cannot wait for that day but I just don't think we are there yet, Hence everyone adding the reds and blues to their 3500K builds searching for a "full spectrum" not to mention those adding UV which is already present to one degree or another in the MH/HPS/CMH and even certain temperature T5 bulbs.

To this day my best veg setup has been my 6500K T5 setup. I myself am trying to find a suitable replacement that is more efficient but haven't gotten there yet. The different manufacturers having different spectrums within the same Kelvin temp ratings doesn't help ease all the confusion here either.
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Personally I'm liking the 3000K 90CRI. I also have 2700K 90CRI samples for testing.
 
Rahz

Rahz

Well-Known Member
Jerseykushface said:
Which ever one you think would b the best
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Well, the 3000K 90CRI contains similar levels of blue as the 3500K 80CRI, but red peak is shifted to 630nm. The 2700K is hovering at the minimum blue requirement... but I'd like to test it to see what actually happens during veg and flower.
 
Rahz

Rahz

Well-Known Member
Jerseykushface said:
So i like buy it n try it n if i don't like it i can return it? Or would it b like test trial i get it and if i like it i get billed on my debit card
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You would be billed up front and given a full refund for the purchase price if you decide to return it. You pay shipping to your address and hold onto the box. If you decide to return it I will send you a return shipping label.
 
Gquebed

Gquebed

Well-Known Member
Jerseykushface said:
Exactly! I b posting shit all over the place cuz i want everyone's opinions n why same way i ask my sibscribers on my YouTube for their feedback n what they think i could do better cuz theres no exact way to grow weed
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Translation:

I post everywhere i can because i want everybody's approval and compliments about how well i grow. I am an attention whore and just can't get enough of it. My favourite place to post stuff is on Youtube because i can collect followers and feel good about myself.

**fixed**
 
OneHitDone

OneHitDone

Well-Known Member
Gquebed said:
Translation:

I post everywhere i can because i want everybody's approval and compliments about how well i grow. I am an attntion whore and just can't get enough of it. My favourite place to post stuff is on Youtube because i can collect followers and feel good about myself.

**fixed**
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I can sure think of a few other members here on RIU that would apply to ;)
 
Evil-Mobo

Evil-Mobo

Well-Known Member
Rahz said:
The T2-2100 is a 150w lamp, and will provide about 410 PPFD in a 3x3 which is plenty for veg and more than plenty for cloning. As far as the K comments, any of the warm white LEDs will do a great job vegging plants. As mentioned 2200K HPS might not be the best color temp for a dedicated veg light but 3500K LED is a different animal. Even low CRI 3000K LED provides veg results that are hard to argue with.
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What device did you use to measure this PPFD of 410? Would it be even across the entire canopy in a 3x3 or just in certain "hot spots"?

And also I thought this might interest you brother @OneHitDone shared it in one of his threads I take no credit for source of info but do find it interesting.
160228F2.jpg
 
Rahz

Rahz

Well-Known Member
Evil-Mobo said:
What device did you use to measure this PPFD of 410?
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The PPFD is based on the PPF. PPF is based on 2.3 umol/j which is well known to be the output of those emitters at 2.1 amps. 410 would be the average so it would be higher in the middle and lower at the edges. Light height over a 3x3 should be about 20 inches.

When I was growing, one of the lamps I used had a veg setting, 740 PPFD at full power and 450 in veg, same type of calculations used to determine PPFD for the tasty lamps. I was very happy with the veg rate under that lamp. It's not something I would suggest flowering under in a 3x3 but it would do a great job of vegging. I've actually veg/flowered in a 3x3 using a PPFD of 500 through the whole grow. Not bad results GPW wise but lower wattage = lower yield.

It was @OneHitDone that flowered under 242 PPFD. I assume the plants were vegged under similar conditions. Veg doesn't take a lot. That's why CFL panel intensity produces similar veg times to higher light levels. Before my LED switch I was using 2x4 and 2x2 8 bulb panels in a 3x6 area. Fantastic veg times, yield not so great.

I had a 2 cob nominal Vero 18 gen 5 lamp in an 18x36 cabinet I used for mom and clones, 60w output at about 35% efficiency, about 250 PPFD. Worked fine.
 
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