That is what I was originally thinking. That 4/light setup is working great for me at another site so far. This location is eventually going to be two 30x30 and two 30x18.
I can pull that off in one room for sure, but might not be able to do 4 per light in all the rooms due to plant ammounts. Allowed is 183 at the moment, will be around 380 allowed soon. Veg is elsewhere.