while T5 are all the rage they just don't penetrate like MH. If your going to upgrade in the future and if the SPS bug bites[it usually does] then buy right the first time. you can just keep the 400w higher for now off the tank and when you get a bigger deeper tank you can just lower the lamp. pendants are good for thi but it can be done with other reflectors. PFO make an awsome dual ballast setup and its not that exspensive.
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