Running an UV in a reef tank good or bad ?

[Casey8]

Thanks Tony and Wayne for your inputs. I think I am going to set it up for my tank, I am not worried about plankton just like Tony said. I have another question, I have seen the Coralife UV bulb for sale on ebay about 15 to 20 dollars while J&L is selling it for 55. Is it another cheap quality ebay bulbs like we purchased for our MH bulbs ? Or is it the same quality ?