How did you suspend you MH lights over your tank

[Jon1234]

Hi There
I picked up a new MH pendent today.
I am looking for some advice as to how to suspend it over my tank.

It is a PFO Metal Halide Horizontal Pendent - Mogul Base
My tank is 3 feet long and 18 inches wide (24" tall)

Should this fixture go perpendicular to the tank or horizontal?
How high above the water should I mount it?

and lastly how would you suspend it
From the ceiling? with what? Wire etc...
I was told to buy a metal bracket and hang it from that but I am afraid of how tacky that might look.

I need it to look good or my wife will be on my case very quickly!!

If you have any advice, I would like to hear it.

thanks
Jon