With a space that big I would get light movers. Covers way more area with way less electricity and way less heat to deal with. Plus, it actually gets better light coverage on the plant, bc the movement of the light helps it get to places on the plant that a stationary light couldn'tget to.
Not to mention, I think it seems more natural. Plants don't normally get a full 16 hours of light a day; clouds move through the sky and whatnot. The sun changes position., etc..
I started using 1 1000 watt light my first grow, I'm trying to double my yield with my second grow and get over 1 gram per watt. Hopefully im gonna have a bigger space the next time around and whip out the light mover, see what kind of uncanny numbers I can get.