Current USA powercompact orbit fixture

I was wondering if anyone had any experience with this type of lighting ficture. if you have any comments or any warning I will happily accept anything anyone has to say. I was also looking into getting the 48" size.
 
i know mh has a lot of power usage running them. are t5's the same way? and also not sure how to go about shopping for those types of bulbs.
 
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