dam 13oz on on3 600 i had 5x400s and 15 diesles and only pulled 11oz but i guess i didnt veg enough and 8 of them were in 1 gallon pots but thats wass up im kinda stressed out a lil cuz if i only get 16oz out of thies set up ima be in da hole i would never get another 400 in my life if it depended on it
i vegged to 18 inches in 3 gal pots, with the 600 to pull 13oz, when i pulled the 26 last run i vegged to 24 inches and they finished at 3 foot, also topped them once for 2 main heads, and they were white rhino, if your abit tight for space then less is more, (plant amount), i used to flower with the 1 400 and pull atleast 8 oz with 4 plants, but with your 4x 400 i would do 8 plants let them veg till around the 18 inches(24 better) put them in 3 gal pots and you should have no problems pulling 3-4 oz a plant.
p.s youve got to take into account how far the light penetrates into the plants and the 400 arnt that good, the 600 and 1000 get right into the plants so the bottom half of the plants end up with some nice size heads on them, when i changed to the 600 from the 400 the buds in the bottom half were like the main colas from the 400. also i would do 2x 600 instead of 1x 1000,
