how much wattage needed per square foot
In a 3x3 foot grow area of supply of light this is enough to grow at least 6-9 plants abundantly. The thought here is to maximize the light as much as possible. You need to provide enough light of 20 â 50 watts in every square foot of the grow area, the more extra light the better you produce plants. In the list below is the numbers of plants in an approximation of the utilization of the number of plants you can grow with various wattage mh or hps grow illumination system.