LED Without LEDs -My First T5 Grow

Since I ran out of height to raise the fixture, I have had to pull the branches away from the bulbs, but can't pull down very much. Comparing to bud branches that are ~ 10" away, no real difference in bud/tric production
 
the fiji purple and coral wave have 5% UV-A and UV-B. anymore than that and you couldn't keep the lights on for a full 12 hour cycle. It would damage the plants. The fiji purp has 5% infrared and the coral wave has 35% infrared.

so no supplementation is needed
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Ah, I didn't realize that the fiji and coral wave had that much UV-B in them. How did we arrive at the 5% number as being the max amount of UV-B? Is there an article or thread that analyses UV content and its effects?

Does the far infrared just aid with flower basically? I know the professor was looking for some far infrared bulb to simulate the dawn and dusk wavelengths in the late summer/fall.
 
WOW. I had no idea my Coral Waves had that much infrared. I have 2 of 8. I haven't noticed any eye strain.

Since we never got a spectrum graph on the Fiji Purple, I don't understand why it continues to be promoted
 
Redoctober said:
Ah, I didn't realize that the fiji and coral wave had that much UV-B in them. How did we arrive at the 5% number as being the max amount of UV-B? Is there an article or thread that analyses UV content and its effects?

Does the far infrared just aid with flower basically? I know the professor was looking for some far infrared bulb to simulate the dawn and dusk wavelengths in the late summer/fall.
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There is a video on you tube some where and an article in high times from around 6 months ago. Both are Ed Rosenthal and Nasa doing LED and UV-B experiments for space at University of Maryland. The UV-B lights they were using are 10% UV-B. They tried using at various schedules. At a full 12 hours, there was damage to trichomes an leaf growth. It didn't get more specific than that. They came to the conclusion that having it on for 5 hours a day produced the best results. To have it on for full 12 hour schedule it would have to be less or possibly half the amount of UV-B that they were using.

The video is just ed rosenthal at a convention talking about the experiments
 
hyroot said:
There is a video on you tube some where and an article in high times from around 6 months ago. Both are Ed Rosenthal and Nasa doing LED and UV-B experiments for space at University of Maryland. The UV-B lights they were using are 10% UV-B. They tried using at various schedules. At a full 12 hours, there was damage to trichomes an leaf growth. It didn't get more specific than that. They came to the conclusion that having it on for 5 hours a day produced the best results. To have it on for full 12 hour schedule it would have to be less or possibly half the amount of UV-B that they were using.

The video is just ed rosenthal at a convention talking about the experiments
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Very cool! I must check that out!

btw, completely unrelated but can you not "like" a post with javascript turned off? I can't seem to like your post hyroot so I gave you rep instead but where is the like button?
 
PetFlora said:
WOW. I had no idea my Coral Waves had that much infrared. I have 2 of 8. I haven't noticed any eye strain.

Since we never got a spectrum graph on the Fiji Purple, I don't understand why it continues to be promoted
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eh, someone posted a ways back saying that the Fiji Purp used to be manufactured by someone else and that it was an accurate spectrum graph according to the prior mfr. The current mfr does not divulge that info. So it's really up in the air. Don't use it if you don't wanna, heh. I feel it is a good bulb. It is working well for me. That's all i care bout honestly.

Edit: I mean I don't think anyone's really "promoting" them... we're just telling people what we're using and is working for us. :shrug:
 
Red, the "Like" is just a single word that shows up in the bottom right corner of the post, right above the poster's signature and straight north from the "Multi-Quote This Message" icon... it just says the word "Like" and it only appears while mousing over each post individually. I suspect this is some kind of javascript. But as Reefer said, I believe you can also like it through that drop-down at the top. I haven't messed with that tho.
 
PetFlora said:
WOW. I had no idea my Coral Waves had that much infrared. I have 2 of 8. I haven't noticed any eye strain.

Since we never got a spectrum graph on the Fiji Purple, I don't understand why it continues to be promoted
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These bulbs are praised by even the best aquarium enthusiasts for a myriad of reasons. AND i have yet to find a SIMILAR bulb that gives the same spectra. Yes we dont have a proper spectrum chart.. ill take the one i can find though....
 
AltarNation said:
Red, the "Like" is just a single word that shows up in the bottom right corner of the post, right above the poster's signature and straight north from the "Multi-Quote This Message" icon... it just says the word "Like" and it only appears while mousing over each post individually. I suspect this is some kind of javascript. But as Reefer said, I believe you can also like it through that drop-down at the top. I haven't messed with that tho.
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haha yeah it is javascript because it's not there for me, nor can I use the big like button. Oh well. From now on, just assume that I like everyone's posts!
 
blaze. Those would probably work just fine for veg. I have no problem in veg with ordinary bulbs. How ever flower is a bit more technical.
 
I see you guys are giving me the like thing. Thanks. I am new around here. I still have to figure this like post thing out.
And thanks for a warm welcome.

I am trying to save the money to get some T5s. I am hopping they are easer on the light bill. And with the aquarium bulbs they would be great. Love this thread. Thanks.
 
People when you look at a spectrum chart, what is before or to the left of 400 nm is uv light and what is passed or to the right of 700 nm is infrared. So the big red spike you see at 765 nm on the coral wave chart is infrared aka far red.
 
pr0fesseur said:
AND i have yet to find a SIMILAR bulb that gives the same spectra. Yes we dont have a proper spectrum chart.. ill take the one i can find though....
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AND how are you trying to find a SIMILAR bulb that gives the same spectra, when you do not even know what that spectra is? Did you obtain instrumentation to measure the spectrum of the fiji purple? You'll take the one you can find though... The spectrum from another company's bulb (nlite PURple), that isn't even on the market

Sorry pr0f I had to go there... with all the talk of real science that goes on in this thread, your comments are pretty deflating
 
I feel like I have let the curious down. (Edit: as it relates to flowering with coral T5 bulbs)

Unfortunately, 2 weeks ago, BK-1 suffered from a combination of moderately high ambient heat which led to lots of rez evaporation, causing the already high ppm (I was pushing her @ 1320) to rocket up to ~ 1900. This would not have been as devastating had I not been feeding every 45 minutes, which was the equivalent of dousing her with high octane gasoline. All the above combined to cause nute burn at the worst possible time- just when all the colas were swelling up. Trics literally melted, but new ones are normal, and some new pistil growth is happening.

Still, a recent sample of pop corn bud from down low smokes great. Even though the pistils are ~ 95% orange (mostly due to burn) she probably has ~ 7 days left

The colas look thinner than in previous pics due to heavy loss of primary leaves, which thankfully, took the brunt of the burn.

These photos are probably my last contribution. I am totally convinced that switching to coral bulbs made a huge difference.

Thanks Pr0f!

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