Fnordish indeed St. Wingnut.

As to what will replace a 600w HPS, there are so many variables that no one can give you a straight answer. That's the reason it hasn't been answered yet.

Many people growing with LED's now, not very many doing controlled side by sides to give you hard data about it. It's going to come down to what works best for the individual.

I'm sorry it can't be more cut and dry, believe me, I'm sure we all would love a concise definitive answer. People can only give you data from their grow, and you have to run with that and make a decision about it.

No one told any of us with LED's that they would replace anything. Most of us stumbled on them as a matter of curiosity first and foremost. We are in the virgin days my friend, I got my hands on some because I don't want to be bringing up the rear, I'm much happier to be the point man discovering new territory.

So, how much LED lighting can you afford is truly the question. If you can afford 600w, get 600. If you can only afford 90w UFO, get it and try it. No one will know better what you can do with them than you:thumbsup:

Give us another 5 years, maybe then we can have some solid data to work with.