EC is just a straight measure of the ability of electric current to travel a specific distance through an aqueous solution.
The relationship between EC and ppm is a measure of the ppm of a common chemical, NaCl or table salt, that gives that conductivity. There is a conversion factor that I can't recall. lol.
Rhizome? Bueller? Anyone?

The footprint of the bloom area is 6x6, or 36sqft. I think it is a really easy size room to work in.
2000w of HPS from a pair of ks at about 140,000 lumens each (when new), ehhh let's see that is almost 8,000 lumens per square foot.
Yeah. Works for me.