LED grow lights... input please.

[sheist]

CFLs and maybe a HPS later..

sheist Reviewed by sheist on 02-21-2006. LED grow lights... input please. Hello guys, I'm exchanging eMails with a representative from a LED company. I asked him if they could produce a custom light for growing, and here's what he told me: Our options are as follow: 940nm, 850nm, 660nm, 630nm, 610nm, 590nm 570nm, 530nm, 510nm, 470nm, 460nm, 400nm and a total of 64 LEDs in the bulb. Rating: 5

[turtle420]

I found this earlier in the thread...

I've got in my grow notebook the following quote from a post:::
<<<<<<<<<<<<<
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.
>>>>>>>>>>>>>

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
.

[ledgrower]

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...

[turtle420]

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
.

[ledgrower]

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..

[newactivist]

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.

[ledgrower]

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

[sheist]

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

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

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..

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

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

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

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??

[ledgrower]

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..

[sheist]

OOOOOOOOOOOh, yeaah yeah