im currently running a stadium setup
its fairly easy to do and its alot more efficient
your bulbs should be able to use vert. i use mine vert and i can use them horiz.
its best to set plants up in stadium setup when there about 1 feet-2feet tall otherwise its pointless and a waste of light
first of all you want to set up a tier system, so levels of plants
mine goes 3 levels high
i use parabolic reflectors which seem to work good until the plants on the top tier get higher than the reflector then i take the wings of so its just a small circle reflector on top of the hanging verticle light
i hang the lights right down so the socket part of the light bulb is level with the top of the top tier plants(if that makes sense lol)
you have to rotate plants everyday to get light evenly spread around all the plants . i rotate mine a quarter turn everyday i use coloured tap to mark the turns and to help keep everything organized(helps alot when working with lots of plants)
you also have to rotate the plants from bottom row to top tiers so light is more evenly distributed
my room runs pretty cool even with 4 lights
just have oscilating fans set up to move the are around the bulbs and plants helps keep it alot cooler in there
there you go dude hope that helps should cover it for stadium setup