HIGH PRESSURE SODIUM - What do i need? Also, Possibly for Metal Halide?

I'm generally new to growing, i have worked with T-5 Fixtures before but never anything more. And im not sure what i really need to invest in to get it going with stronger lights
I'm not talking about ventilation and such, i understand MH and HPS are much warmer and i can handle that. Just as far as what to order as for lights is where i'm confused.




This is what i found online, really cheap, but isn't this just the lamp? (i know i need bulbs) Don't i still need something else to power it? I could of sworn using HPS or MH was somewhere in the hundreds of dollars.

http://www.1000bulbs.com/product/88235/PX-UGRWN15.html

Any feedback helps.

-Thanks
 
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