LED grow lights... input please.

I found this earlier in the thread...

Quote:

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Originally Posted by turtle420

I've got in my grow notebook the following quote from a post:::
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for good growing you need blue, red and deep red spectrum. for clorophile A you need 400-430nm of blue and 650-670 nm of red. for clorophile B you need 420-470 nm of blue and 620-650 nm of red.
peak absorbtions are at A: 425 and 660 nm, and at B: 450 and 630.
the power of spectrum should be stronger in red spectrum (arround 85-90%), others arround 5% of each. i did some test grows, but i only used 470 and 630 spectrum and the plants looked just fine. if you give them all the spectrum (for A and B type), they will grow even better.
>>>>>>>>>>>>>

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Jesus guys! This thread has grown unbelievably! :) THAT'S GREAT!

I need to catch-up on all the posts, but everything looks super interesting. I need to read the super-post by LEDgrower... sounds very informative.


My thoughts on the LEDs:
Compared to HID's intensity/lumens, they suck... BUT, because their produced photons (light) are on a specific range (not all over the place), they're more efficient.

Now we've got to see if they're more, um, "better" for growing weed... ;)

Again, I trully want to give input and comments, but I haven't had a time to read everything... I'm running out the door today pretty early (sun still hiding), but later today I'll be here.

Peace, love and good chronic to all, ;)

-turtle420 :cool:
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forgot toanswer the question on sizing.....those bars are about 22 inches long and 3.3 inchs wide and only being only a cuple of inchs thick...

I was searching my files, and found this...

It's a time-lapse video of a LED grow... don't ask me where I got it... no idea... You might find it interesting. :)

Hope you enjoy,

-turtle420 :cool:
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ha.. im telling ya man..its the future....but u see there those lights there are purple....think about it... what 2 colors make purple....red and blue primarys,, they just mixed the lights.... of the 2 colors..it would be interesting to see the spectrum of that light...s..thats why those work but there not even using the rit mixure for optumum growth... u still can add green soo the plant looks good..

I believe the LED's would work for small closet growers but I still feel the sulphur lamp would be a better alternative for large scale growers.

LEO must be shitting themselves trying to figure out a way to detect these lights! LED's are the ultimate stealth light source, no doubt.

ha... thats rit..finnally some agrees with me... and with a 8 bar array system for leds.. you can project the same amout of light equivant to a 1000 hps setup on a 3 by 3 or 4 by 4...however sulphur lamps?? your out of your mine...lol..they produce like 2 times the light of the SUN...how would u use those...unless u were to hang that up from like 10000 feet in the air...lmao..look for my website coming out soon

www.ledgardening.com I have a temp page up but in the next week or soo illl have it up and running with full product/ reviews,actual testamonies, and press releases of the upcoming future of led in growing... takecare

that time lapse clip was from the nuturelite website.. however it can't necesarily be compared to the growth to a mary jane.

Quote:

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Originally Posted by ledgrower

what 2 colors make purple....red and blue primarys,, they just mixed the lights.... of the 2 colors..it would be interesting to see the spectrum of that light

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the way i see it, thats wrong.. u can't make the spectrum because you mix two colors.. purple has a specific spectrum, look at the scale.. THATs why the plant is growing so well.. there is another contingency on the scale that ppl neglect (even I had, before I saw it)... in addition to the blue, u should also add the purple spectrum LED to it, to get that extra push in there, u can see how well its performing on that plant without the blue..

Quote:

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Originally Posted by ledgrower

u still can add green soo the plant looks good..

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adding green is a waste of money.. its not as much of a potency factor as the others..

Quote:

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Originally Posted by ledgrower

you can project the same amout of light equivant to a 1000 hps setup on a 3 by 3 or 4 by 4

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with LEDs? no, u can't.. LEDs are based on spectral intensity, not illumination..

as for sulfur lamps.. how much heat output is given off??

saying that that 1000 watt hps is giving off 75 % heat and 25 % usable spectum as compared with a led setup where its giving 99.9% usable spectum yes u can..and also u wont burn the plants..

OOOOOOOOOOOh, yeaah yeah

The sulphur lamps give off very little heat. NASA developed both the LED grow systems as well as the sulphur lamps so they could find indoor plant lights that give off little heat. It seems they have a problem in space losing heat inside the space craft once it's generated so they needed something more efficient than HID.

Either of them will grow cannabis no problem. There is a LED grow movie that I found but the director had just been arrested for creating it. I'm trying to get the company to post it on file transfer software so we could get it even though they obviously can't sell it any more. I saw some still shots from the movie though and they had some very definite fat ass buds. Will keep you posted.

The reason I believe sulphur lamps are better for large scale grows is that with all the extra PAR the difference in yield from one crop would make up for the cost of the light. Also, not having to compensate for the heat from the lamps would make up for a lot of savings as well, not to mention a better security profile.

Neither of the systems will burn your plants as they generate almost no heat. IMO, LED's would be for small scale closet growers and suphur lamps for commercial grows.