i am going to grow some lowryder2 in a box i built that is 4x2x4 and split in the middle to have 2 levels. i want to use a T5 with 4 bulbs on each level that is supposed to put out 20,000 lumens total. i will have 15 lowryders in each level. i figured that since they are only about a foot tall 1,400lumens per plant would be enough. would someone that knows what they are talking about let me know if thats enough and maybe will i have a height issue with 14in growing room for the plant. thanks a lot in advance