Hello,
Anybody ever tried this?, sound too good to be true....

LED Grow Lights - LightBlaze 400

my response, cross posted from a reply to your same question, asked in the Get A Harvest Every 2 Weeks thread.

__________________
Get a harvest every 2 weeks - A batch of clones in rockwool - Al B. Gone

The sound you hear is your bullshit detector going off -- listen to it.

__________________
can't waste time or space playing games.
this sh*ts for real.

there kind of good for veg. and seach out "led vs" at youtube.com

__________________
http://www.imeem.com/casstacular/vid..._comedy_video/

They're not 'kind of good for veg.'

Plants vegged with insufficient light intensity will become spindly, with thin stems and long distances between nodes. If you want spindly plants, go get some LEDs.

CFLs will do better- and that's not saying much.

__________________
Get a harvest every 2 weeks - A batch of clones in rockwool - Al B. Gone

thanks for the info

__________________
http://www.imeem.com/casstacular/vid..._comedy_video/

yeah.leds suck...i tried em and got rid of them about half way through veg.....pllus ..that set up looks complrtley inneficient...

__________________
my half assed grow journalshttp://www.rollitup.org/grow-room-de...oom-build.html

um.. no, and i dont plan on trying. 600 dollars for that??? lol you must be joking..

Look man, I don't know who you are or where you get your information (its certainly not based on science), but I just couldn't take the complete inaccuracy of your post so I decided to make an account so I could respond.

You need to calm down man. I don't know if you just had a bad experience with led growing or what but saying "absolute crap" and "bullshit" just proves you dont know what your talking about. Furthermore, it should be illegal for you to post all that completely bogus information and pretend like its truth.

Quote:

There's a reason that these lamps don't have a lumen rating. If they did, you'd find they put out about 10% of the intensity of a CFL and about 0.25% of the intensity of a 400HPS (based on the very brightest LEDs made, the Philips Luxeon line, which make 140 lumens [and incidentally, the lamp you cite does NOT use Philips Luxeons] CFLs at about 1500 lumens and a 400HPS at 55,000 lumens).

Again, you have no clue what you're talking about. There is a very good reason why led grow lights dont have a lumens rating - its because lumens is a measurement based around YELLOW-WAVELENGTH light. Did you even read the FAQ on that superled page? Or maybe try wikipedia:
Lumen (unit) - Wikipedia, the free encyclopedia

You cant measure an led grow light in lumens because led grow lights are tailored to the wavelengths plants are most sensitive to. An led grow light could have a MUCH LOWER lumens rating than another light but grow infinitely BETTER. Obviously LED lights will have lower "lumen" ratings, but using lumens as a measurement for growing purposes is completely worthless!

Look at this chart of plant Chlorophyll absorption:
Image:Chlorophyll ab spectra.png - Wikipedia, the free encyclopedia

Now look at the graph of the lumen unit measurement:
Luminous flux - Wikipedia, the free encyclopedia

"The luminous flux accounts for the sensitivity of the eye by weighting the power at each wavelength with the luminosity function, which represents the eye's response to different wavelengths." In other words, lumens are good in measuring light for humans but completely irrelevant in measuring light for plants.
Make any sense?

Quote:

Remember that lumens from multiple light sources don't 'add.' A pair of 140 lumen LEDs lighting the same area will apply 140 lumens to the area, not 280. Same goes for any multiple light sources.

uhhh, where in gods name did you get such a patently WRONG idea and become so certain it was true?
I hate to have to explain such a common-sense concept... but adding two 15 lumen lights together pointed in the same direction IS roughly equivalent to a 30 lumen light.

Quote:

Putting dim lights next to dim lights does not give you brighter light- it gives you more sources of dim light over a certain area.

Eh? What in the hell are you talking about man? This is completely wrong.
Try staring at a flashlight for a few seconds. Now get 5 of the same flashlights, tie them real close together and stare into them. Do your eyes hurt more? Well they shouldnt! Light output shouldn't be any different from one flashlight! Right?!?

Its a simple concept. Light = energy. More sources of light = more energy.

Quote:

If this multiple LED lamp used Luxeons, its luminous output would still not exceed the lumen rating of a single Luxeon LED.

If you have ever measured light you would know this is just simply not true. Adding more leds WILL increase the overall lumen output. (Ignoring the fact that using lumens to measure growlights is just stupid to begin with.)

Quote:

The short answer is 'yes- too good to be true.' LEDs are very expensive toys- and you won't grow any dope with them. Anyone who thinks they will grow dope is a fool. You'd be better off trying to grow with candlelight- at least you'd get some CO2...

Ahh yes the moment of truth. Anybody who thinks they will grow dope is a FOOL, you say? You should really watch what you say at the cost of looking very very stupid.

The following pictures are of the Lowryder2 strand grown from seeds using an ebb & flow system w/ canna nutrients on a 16hr light cycle all the way through. This was done using only the LightBlaze 400 which happens to be the light you are bashing in this thread.

Shes a baby->


Getting bigger, looking healthy->


Yep, 100% LED grown. VERY happy with the lightblaze 400 from LED Grow Lights - Plant Grow Lights ->


And heres a closeup ->

So what were you saying there about being a fool?

Quote:

I'm rarely this unequivocal on matters asked of me, but I'm a bit sick of both the idiots selling this garbage and the nongs on cannabis boards trying to convince others that they actually will work in the manner advertised. They don't.

Stop acting like you are so sure of yourself. I had no troubles growing my MJ plant and people who see it are so thrilled they have been convinced to buy an LED unit themselves. There are certainly a lot of crappy led grow lights which are scams, but that doesn't mean the entire technology is flawed!

NASA is successfully using leds to grow plants in space (try googling it), maybe you could enlighten them with what you know and convince them they are wrong.

Quote:

LEDs have a future in lighting- whether that will include lights which can grow cannabis at some time in the distant future or not remains to be seen, but the simple fact is that right now, there's no such thing as an LED light that will grow cannabis successfully.

Unless you want to come back and tell me my pictures are photoshopped, i suggest you stop touting your incorrect assumptions.

Quote:

Anyone taking your money for such items is a thief, plain and simple. Consider yourself warned. If you buy LEDs to grow dope, you'll get some interesting looking lights but no dope. If you want to grow buds, select the most powerful single HPS you can use in your space and still control temps below 26C. Cooltubes make this deadset easy.

You can talk shit on LEDs all you want, but my results are not isolated. There are others having just as much success as me and eventually you are going to look more stupid than you do already. peace.

how many weeks into flowering are you.....

__________________
my half assed grow journalshttp://www.rollitup.org/grow-room-de...oom-build.html