You really need at least 2500 lumens a sq. ft. to grow decently; over 4000 is a lot better. A 150w HPS, like I said, will produce about 15,000 lumens. You could get a marginal 6 sq. ft. grow with it, or a pretty good 4 sq. ft. grow with it. 200w of CFLs will probably give you about the same amount of lumens. The CFLs will be cooler so you will have less problem with heat; they are less efficient, so you won't get the light depth into your plant.

Hey Bro, Great information and i am new to the site. I just want to get your opinion on a grow system i have (first time grower). I have a bubbleponic system in a 32X64X24 grow hut i am running two 6" fans with 455 led lights rated at 54 watts and 2 23 watt cfls. (100watt replacments). i am running about 80 degrees and about 60% humidity. I havent planted yet due to i want everthing perfect and running smoothly.(i have 6 5 inch plants outdoors right now) im going to transplant soon and was wondering if my lighting if enough to produce good plants. Any info would be greatly appericiated. thanks alot