Expanded grow room

Finally had time this weekend to upgrade my growroom, Raised the center ceiling 6" and widened it 12". I'm using the double layered alumnized foam material for the lightscreens, easy to work with and easy to move around. I'm using the area between two rows of storage racks (18X36X72), I,ve left the shelves in place for the equipment and work areas. The center ceiling is 5/8" plywood, so I can hang just about anything there, I may install an exhaust fan later if the smell gets to be a problem.

Looks like a plan to me

The 30" box fan really works great, it forces in cool air from the floor area and there is plenty of natural air leaks in the shed to 'off-gas' without problems. I can expand the 'flowering' area several feet into the main hallway if necessary. I have 4 females in #5 pots and 1 re-veging WW, also in a #5 pot. Looks like there is room for at least a dozen or more.

Any ideas on the number of plants (in a SOG) the main flowering room could support? There's room for one more 400w HPS. Any advice please.

Added a third 400HPS to the flowering area, and painted the walls and ceiling with that white roofing paint. I also added a 'viewing window' to the light screen.

pic of the light screen.

one reveg and one new girl