I recently acquired a couple of 4 bulb T5 fixtures (18"x4') 54w at a price too good to pass up. After conferring with a friend in southern Oregon I decided to toss a few clones in small pots under these T5's to see what the hoopla have was all about. In the next 2 weeks the clones exploded into lush green bouffant of foliage in which even I was taken aback. After a little research I found that T5's are an excellent way to grow excellent strains of your favorite bud. Using the method of square footage of your grow space say 4' x 4' is 16'. We times that by 4000 lumens that is needed in each square foot. 16' x 4000 lumens is 64,000 lumens total. Adding some splitter 100w cfl single bulbs (5000 lumens) to the 40,000 lumens we get from the T5's should put us where we want to be around that amount. Side lighting or reflective material will work best at getting light penetration and moving around the single 100w to hard to reach spots. No the question I have for you guys is how many plants and in what size containers do you think works best?