Quote Originally Posted by irydyum
No.

Unless it was like a 75 or 100w HPS, then maybe. But you are talking about 7000 lumens where your typical 400w HPS is delivering upward of 40,000 lumens.

It's not to say that you won't get results, but they wouldn't be comparable to running any kind of HID.
Is it really accurate to compare my cfl grow with a 400w HPS system? I mean, no one would actually recommend a 400 W HPS system in a 3 cubic foot, 1 square foot grow chamber.