It's not about lux or lumens or watts that define a light "good" for growing, it's mostly about, if i recall correctly, photosynthetic active radiation. I read it somewhere few years ago and I can't quite remember the source.
There were few guys discussing about LED effectiveness, and it all comes down to the quality of your LED's and drivers.
There was a guy with a PC box pulling 38g dry off a total of 30-ish watts, driven at 80% power, 3x northern light plants. That's a more than gram per watt, he was using OSRAM Gold Dragon LED's, 50/50 red and blue LED's. But you can use warm white in a combination with cool white, I'm certain.
Can you post the LED's you have? Or if you're just planning to order them, go for Cree's or Osram.
There were few guys discussing about LED effectiveness, and it all comes down to the quality of your LED's and drivers.
There was a guy with a PC box pulling 38g dry off a total of 30-ish watts, driven at 80% power, 3x northern light plants. That's a more than gram per watt, he was using OSRAM Gold Dragon LED's, 50/50 red and blue LED's. But you can use warm white in a combination with cool white, I'm certain.
Can you post the LED's you have? Or if you're just planning to order them, go for Cree's or Osram.