I'm not sure what you are asking....are you wondering how large a space you should run to supply a flowering space that is going to have 3000W of HPS for flowering?
Im going with 3000 watt flower how many watts would be ideal for veg. I am just making one room, got the gavitas and a dual split mini ac on the way starting with one room then I will have a veg room after 6 months or so. Still need Mh lighting to for veg though. 3000 lumens per square foot is Ideal for veg???