Personally I've only ever used a MH bulb(just picked up my fiirst HPS today yay!), so my opinion here isn't quite valid yet. But I will say that you get what you put into your plants. You can grow bud on your window sill using dirt from your backyard, but every improvement you make increases the yeild and quality of your bud. You get what you put in plain and simple, that includes lights, money, time, climate control, and most important you dedication. Balance and compinsation for short commings goes a long way.:stoned: