LED grow light question.

For me I'd buy a blackstar 600, they pull 3 something watts. Or get the 900 if you have even more money to burn. you still need an equivalent watts to 400 though to compete. Supposed long life and not changing bulbs is where your savings comes in

I do however believe you can veg a 4x4 area with something like a bs 500, its the flowering where you need more oom

I am running a 240w panel in my 3x3 and supplementing with CFL until I can afford to add another. The manufacturer of my panel claims that usable light output from the 240W panels is equivalent to a 400w MH/HPS, but I don't think they do as nice a job when it comes to coverage area which is what led me to supplement a couple CFLs in my setup for coverage.

You answered your own question. If you can't find a single LED fixture with a switch to alternate between grow and flower don't buy it, or be prepared to supplement

So one 90w led light will be good for a 5'x3'x1.7'?

I don't think you are going to be happy with a single 90w in that space, I would use two or go bigger. I think a 240w would be perfect in that size cab though, wouldn't need the CFLs like I do in the 3'x3'x7'. How many ladies you planning to put in it?

If you think MH/HPS are expensive price som LEDs.

Originally Posted by HelsBane

I don't think you are going to be happy with a single 90w in that space, I would use two or go bigger. I think a 240w would be perfect in that size cab though, wouldn't need the CFLs like I do in the 3'x3'x7'. How many ladies you planning to put in it?

I'm planning on growing 6 or 7.

And HelsBane, I know the MH/HPS bulbs are cheaper, but i'm looking at the electric bill.