Hey Cali
Each 600w led grow light has a coverage area of 3ftx3ft, and in regards to the height, it will cover between 18-24 inches. So if you have a 4ftx4ft tent that is 16 square feet of grow space; which according to the calculations of 9-square feet per plant, you would only be able to have one plant inside the tent with one light.
But in reality, that’s not how most growers set up their tents. If you have ever grown medicinal plants you like to get the most plants possible in a grow tent, but you need to hold back on overcrowding the plants in a tent.
The plants need room not only to grow out, but they need the light to be able to “hit†all areas. If you have too many plants in too small of a space then you are limiting the plants’ chance to produce a higher yield. You may even end up with smaller plants, little yields and unhealthy plants.
GROW SPACE SIZE MINIMUM NUMBER OF WATTS REQUIRED NUMBER OF PLANTS YOU CAN GROW
9 sq ft (3×3) 450w 1-9 plants
12 sq ft (3×4) 600w 1-12 plants
16 sq ft (4×4) 800w 1-16 plants
20 sq ft (4×5) 1000w 1-20 plants