hi im thinking on steping it up a little im gonna use 4x 600w high pressure sodium lights in a room. wot would yous think in amount under that amount of light thanks for any feed back
13000 lumens per square foot optimal. I base this on all the seed companies and other growers use a 1000 watt HPS in a square meter tent,
or a space that equals a square meter. 1000 watt HPS = 140000 lumens. Square meter is 10.7639 square feet. 140000 divided by 10.7839 =
13006 lumens. So 4X 600 watts, @ 95000 lumens each, I'd go with 29.21 square feet to maximize lumens, and space. Remember, after the
1st 12", you lose 1/2 your lumens per each 6" thereafter. Make sure if you use HPS, especially 2400 watts worth, get some pretty good active
ventilation.
And, 1 plant per square foot. I hope this helps.