With the LED you are concerned with wave length - you want a something in the neighborhood of 80% Red 15% Blue and 5% White. The red needs to be in the 680 nm wave length and the other concern is watts per diode. 1w LEDs are fine for some application but 3w is better. Finally, you are also concerned with the lens angle. That is, what is the spread of the lights? Does it come down like spot or is it more defuse. A more defuse lens will allow you to get them closer to the plants. Closer is better. I am by no means well versed. Others here can guide you much more efficiently. I'm pushing the boundaries of my knowledge as it is... You may be fine. You are on your way down the road with that plant. If it fails, you will know to build out your lights.

Keep us posted.