All you are looking at is 5/600W versus 2/1000W. You already said you are only running 1/600W in veg, that alone would allow me to get bigger plants than you faster, period. Oh and the fact that I am using light movers so my 1000W is either closer than your 600W or the same distance from the plant, which means better light penetration. So while I am running 2kW throughout veg and flowering at a closer distance than your 600W, you are going to what, run a 1/600W for veg, and then throw a few more on throughout your flowering? Lol, and you think you're going to out yield me?
Prove it? Sure, you build your two 12'x4' tables with 5/600W lights and I'll get my two 12'x4' tables with 2/1000W on light movers and we'll compare cost versus return. I guarantee you will be using more electricity, more money, and more time to maintain your room versus mine. Shit we'll even log hours in the grow room per week to see how much you have to maintain your room versus myself.