Somewhere on this forum is a grow diary of a guy that had a $5000 set up and 2 plants, which turned out lanky with small buds. LED lights do not produce enough of the full spectrum of lights, only red, blue, and orange. Marijuana needs a broader spectrum of light to grow and reach it's full potential. LED lights will be the wave of the future, but at this time, they are still lacking in the quality. True, your light bill will go down, but your yield and potency will take a DRAMATIC hit to the final out come. If you are growing, why waste time on small buds when you can pay a little more and buy a 400w light? It puts out everything LED lights do, but with far better buds. Sure, you may pay an extra $50 a month on your electric bill, but you gain soooo much more with potent buds. Don't get me wrong, you can grow buds from beginning to end with LEDs. However, after that first harvest you'd wish you didn't pay that much for lights, and instead used the money to pay your electric bills over the course of the year; while at the same time, producing 2x or 3x as much buds (giving you much more return). LEDs are completely inadiquet.