I found this earlier in the thread...
Quote 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
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