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What he said is pretty much what I have to say just in different words. If you want fat dense buds you need the MH/HPS =]
Give me some more details on these people first. What type LED's are they using? Like I've seen them being built with 1 watt leds which is the only type I personally would consider and even then LED's just can't do what MH/HPS can.
I haven't seen much with them but honestly if you intend to do a mass grow for profit you really just need to jump on the MH/HPS wagon. LED's are good to supplement lighting because of their direct color spectrum which they output, but they haven't(and probably won't) match the spectrum that you get from the HPS or MH. I thought about them and I just ended up not ordering it because from what I can see they just aren't worth it yet.
If you have other reasons such as heat, electricity consumption, etc. then I understand and I'll try to help a little more if I can but my first suggestion is to try to use the MH/HPS if at all possible because of obvious flaws in the LED systems out there...Its going to be hit or miss with MH/HPS its tried and true and will work every time I can guarantee it, something those LED manufacturers probably can't say.
Yea he did and I agree with either that site or one similar, I've had good luck on these sites for most things and believe me I've used them for quite a few...Anyway, try em out:
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