Dr hash, it's all about intensity/lumens. To get the hard, full and large flowers you need the intensity that only comes from the sun and HID's. Flouro's do work but most end up with skinny and fluffy buds instead of the hard nuggets most seek. But as long as you don't mind softer, feathery buds and would rather save a few bucks than put out for "the real deal" then stay with flouro's.