Oh, okay - now you're talking. 5,000 lumens per square foot. Some people say they skrimp by with a little less (I wouldn't advise it). Some people use more (especially in flowering stage).
wow im working with like 116000 all together in a 4x4 sunhut with light comin from the top and two sides. is that to much even tho my temp stays below 90
sounds like a troll or a very inefficient grower... thats close to 2000w per sq foot when you factor the distance from light and lumens lost. troll less and stuff.
