Led's are to be used in conjuction withother lights. the point of them is so you can put them pretty much toucking your plant and they do put out some good veg result asfar as flowering though... my friends set up is a white/blue/red LED and an 400w hps amazing buds!!! but evry1 should experiment what may work for some won't work for all
I have been playing with LED's for a few months now, and my opinion is that they cant replace good ol' HPS or even CLF, but they are great for supplemental lighting. I put a few panels on the sides, and they really helped to boost growth in otherwise shaded areas.