LED's are very expensive and if they are low wattage ones (the vast majority), they simply don't produce many lumens. You can purchase LED fixtures made for commercial greenhouse growing, but they run into the hundreds and some into the thousands of dollars. I have been disappointed in both the lumen output and the longevity of my LED's.
Oh, by the way. The T-5's, though producing more lumens than a comparative T-8, is nowhere near as strong as the T-5H tubes. Try to find those high intensity tubes. The fixture will be the same (I think that's right).
