I have one of these units and ended up upgrading all 3 ballasts and all 3 lamps and the difference in brightness and color was unreal. I thought it was a great deal but after adding the costs of the upgrades I could have and probably would have purchased a different brand. Beware of Coralife as its quality is comparable to the aquatraders light. I have seen coralife lights with new ballasts and the difference was also huge. I would not recommend a coralife light.
There is also a HUGE thread on RC regarding this light if you feel like spending all day reading about them. LOL
http://www.reefcentral.com/forums/sh...5&pagenumber=1