[dava04]

Aside from the fact that saving electricity is not optional today, the view point of racefan (I don't mean to be harsh) is irresponsible at best, you just can't justify using 1000W of power to grow a plant thats marginally better than one grown using a quarter of that power.

The main problems from what I see with LED grow lights are, and conversely this is exactly how to choose a good one.

The intensity, choose a light with high proven MCD intensity.

The angle of the light needs, need to consider that more lights are used to cover the same area of one large HPS.

The actual shape the beam the LED creates, as not all LED lights are created equally. This means that if when you look for an LED light for growing you should test to see how the light looks when it comes out of the light, if it seems weak, then its weak and and good strong solid light is best.

Obviously these lights can grow plants, otherwise NASA would be using them, the point is that the secrets on how to use them are only just being uncovered, diligence care and research when choosing a light will reap its reward.