In my opinion, if you are going through the effort to grow, you might as well ensure a great product, by using proven technology. The LED technology for horticultural applications have not matured to the point where people like us should be using them. The cost of our product is too high.
Will your plants grow, yes. Will they grow well, yes. Will they create a product that is comparable to an HPS grow, no.
If you're into experimentation and innovation, then go for it. But if you are into great marijuana, then don't use LEDs to grow.
If you have an interest in high tech lighting....do some research on Plasma lighting. I think it's the best alternative to LED.