I'm using cfl's, have four 150 watters at top of plant with reflector, and about ten 26 watters around the plant, all 2700k. My bagseed hoe has a fat ass cola and alot of sideshoots with nice size buds, foxfarm original soil and adding schultz's 10-15-10 plant food, it is in a ten-gallon pot and the plant is only 22 inches tall. Some fan leaves are eight to ten inches top to bottom and nine blades!! Pink pistils near the top, flowering for 5 to 6 weeks! Got lucky with this bagseed, should yield at least 2 oz or more when dry!! So, you can grow with cfl's just won't yield quite as much as with HPS! Wish my camera worked to show the hoe!!