Mr.StickyFingers
Active Member
My friend has had a 400w hps on a 2.25 square foot area for most of his grow. He found another 150 and is debating putting over them too making it a total of 550 in a 2.25 ft2 area of plant matter. A fan is keeping the canopy at 75 degrees with them 9 inches away. Is there anything he should worry about besides heat with that much light per foot2. It came out to about 200w per foot2 and 25000 lumens.