Have you not read any of the research done by tons of scientists from NASA to universities about the effects of green spectrum on plants? A really good article on the subject was already linked in the thread, maybe this time you will read it
http://www.heliospectra.com/sites/w...ents/what_light_do_plants_need_2012-10-05.pdf
Also temps in my grow space are the same as ambient in the room yesterday was a high of 78F. The LEDs may produce a slight amount of heat but they all do. Most people with LED lights never complain about the heat thats one of the major selling points of LEDs. When I was running HID lighting I had to run A/C constantly.
I want 5w LEDs because they have a longer throw and better penetration. Im running 80 5w in 7 wavelengths right now.
And Im not so sure that yourself and Alpha dont have something to do with this company so yeah I feel like the grow journal could be biased. Just saying its odd how you follow the links on the webside and you see Alphas name plastered everywhere....