420weedman
Well-Known Member
cfl rocks the house for vegging 
first closet grow with UFO
- Thread starter littlegrower2004
- Start date
sooooo...youre confirming what i said?
thanks...i think...
$600 though?...ouch!!!!...ive seen the exact same light for $305
dmoneysaver
Well-Known Member
What the hell is a ufo?
littlegrower2004
Well-Known Member
its not the same i guarantee..theres alot of fakes and thats prob one..i have one from HID hut
littlegrower2004
Well-Known Member
420weedman
Well-Known Member
should be at least 1/2 maybe more
mindphuk
Well-Known Member
I don't see why we can't design an LED light system that will work for flowering. Right now, it appears that most LED systems are using just two types, one that peaks in the red and one in the blue. However, if you look at the chlorophyll curves, you will see that plants need wavelengths in more than just 2 peaks. LEDs that peak at 470nm might not be activating chlorophyll a and a big chunk of b.
BTW, has la9 actually learned something about PAR/ PPF yet and realize that lux and lumens aren't important when discussing wavelength specific lighting? Here's a question for LED haters. Did you know I can give you a sunburn by using light that is virtually zero lumens?
littlegrower2004
Well-Known Member
I don't see why we can't design an LED light system that will work for flowering. Right now, it appears that most LED systems are using just two types, one that peaks in the red and one in the blue. However, if you look at the chlorophyll curves, you will see that plants need wavelengths in more than just 2 peaks. LEDs that peak at 470nm might not be activating chlorophyll a and a big chunk of b.
BTW, has la9 actually learned something about PAR/ PPF yet and realize that lux and lumens aren't important when discussing wavelength specific lighting? Here's a question for LED haters. Did you know I can give you a sunburn by using light that is virtually zero lumens?
i guess majority of ppl that think they know why LED dont work say that it is because the light doesnt penetrate the foilage well enough to give lower buds enough powerful light...so in theory cutting off all bottom growth and using the LED for a SOG or SCROG should work...any one want to say why if thats wrong or not???and why???
mindphuk
Well-Known Member
I don't think that's the issue. The amount of energy as measured as photon flux density can be quite high, especially for Cree Xlamp high power LEDs. I think it is still a spectrum issue. Every plant has a unique spectral signature and absorb and reflect different wavelengths than other plants, so an LED setup that can grow tomatoes might not be as useful for growing cannabis. Law enforcement has been trying to use this information, spectral imaging to look for pot fields in the air by distinguishing them from other native plants. I know a lot about light, but not much about horticulture. Most of my light information comes from studying algae and symbiotic zooxanthallae in coral structures. I think LED certainly has potential, but the underground nature of our growing makes real scientific study difficult. There is however some other things to look forward to in the future, Luxim plasma lighting as seen http://www.treehugger.com/files/2008/04/luxim-plasma-lifi-light-bulb-led-cfl.php
littlegrower2004
Well-Known Member
so then in ur theory adding the spectrum from my 300watts of hps to the led spectrum should b part of the key??
la9
Well-Known Member
Probably because they only sell LED lights that are mostly Blue in spectrum, I don't see any mostly in the Flowering Spectrum. Why don't you guys design one that is mostly RED, it should work. They do sell LED's in the right spectrum to Flower. All I hear on this thread is that LED's are bright enough, they are ready for prime time, so it shouldn't be a problem.
mindphuk
Well-Known Member
Not just in theory but in actual practice, all HPS produce enough PAR to flower, it's proven everyday. So yes, supplemental HPS will help for sure, but my point is I think it is at least theoretically possible to get as much energy in the right wavelengths to grow with LED only to match or even surpass HPS lighting for much lower electricity costs. There is an instrument that measures photon flux density and LEDs can produce a surprising amount of energy, it's merely compressed into very small peaks along the EM spectrum. The key is going to be getting the right number at the right spectrums which is where we need the research.
Imagine those pure infrared LEDs, the ones used for night vision. The lumens on those is virtually zero, we cannot see those LEDs illuminate. However, using IR detectors in your regular digital camera, those suckers light up like Christmas trees. So lets say our plants need more near IR wavelength, the lumens will be very low so the light will be dim to our eyes, but if the plant can utilize the energy in that wavelength, the lumens don't matter one bit. This is where la9 was just not getting it. LEDs work, we just have to find the correct combination for OUR plants.
littlegrower2004
Well-Known Member
la9
Well-Known Member
Then flower with it, if it is in the correct spectrum.
littlegrower2004
Well-Known Member
la9
Well-Known Member
No the problem is you can not find any flaws with your grow light yet it is not successful at flowering, so flower with it and let us know the answer.
If I say it doesn't have enough penetration, you say it does, I don't know what I'm talking about.
If I say it isn't bright enough, you say it is I don't know what I'm talking about.
If I say it doesn't have enough of the right spectrum, you say it does I don't know what I'm talking about.
If it has everything it needs to flower then why is it no good at flowering ?
You can find no flaws in your UFO light then it should flower without any problems. Show us that it is good at flowering then.
charlestonchunk
Well-Known Member
Results..I never have seen a journal that goes from begining to end. What are thay hiding..I do think that technology is just around the bend.
littlegrower2004
Well-Known Member
we havent argued in awhile yet u come on here and bring up old shit...weve already decided that it doesnt penetrate well, doesnt have the right spectrum, and that it isnt good for flower...all i say is it does work for veg adn does it very well IMO...i was just reading up in my cannabis bible last night and now realize that the problem IMO is that marijuana needs way more than just the RED and the BLUE spectrums and thats all the LED provides...from the bible "deep blue, encourages excellent leaf and stem growth. light blue, encourages good leaf and stem growth. neutral white, promotes normal growth. warm neutral, promotes rapid growth. warmer yellow neutral, highly active photosynthesis for all stages of growth. hot orange or red, promotes flowering."
just do your own thing
