http://en.wikipedia.org/wiki/Cannabis_(drug)_cultivation#LED_grow_lights I just came across that. I'm wondering if anyone has tried this, or has any info on it. It sounds very interesting, and not too hard to setup.
i remember reading a thread, where the guy went extensively into describing them and how n.a.s.a. had done experiments with them... it sounded good and cheap to homemake the setup,,,, search the archives,,,, it may have been at growkind.com i seen this ,,, either this one or that one , one of the 2,,,, just do some past archive searching,,,,, its in there...
LED's work. My buddy has a patent pending on an LED light setup good for vegging and flowering pot. His partner just screwed him over so he is in the process of making up a new web site so that slowed things down a bit. The only problem with them is they are super expensive. He will hopefully be joining grass city real soon. I read the posts by Guy from 70's and that is the same thing my friend is doing.