You want 3,000L per sqft in Veg / 5,000L per sqft in Flower.
So, 2x2= 4sqft x 5,000L = 20,000L for optimal growth.
SmokeMyPiece Reviewed by SmokeMyPiece on . Hello... My name is tab2012 and i am a first time grower...ok enough with the small talk HELP!!! I have read, re-read and read again all about lights and who sees what...and still so damn confused..my little grow room is only 2feet by 2feet and we have only 4 plants..(i just started them on 12/12 wednesday)... We keep the lights about 1.5"-2" away from the top of the plants. The lights are 1600 lumens btw and we have 6 lights in there. so if i am correct thats 9600 lumen...Yes?? NO?? :( Rating: 5