I've got 3x 23w 2700k floods, 2x 23w 2700k and 2x 13w 5000k bulbs up top, and 6x 23w 2700k and 2x 13w 5000k bulbs on the sides for a total of 305w.
It's a 2x2x4 space, and more crowded than I had planned on, LOL.
If you do vertical side lighting, I'd be interested to see the difference, if the light spreads out better which way.