Dear Friends, I have 75 gal tank and I am have 10pcs. of 40 watts GESPX50 TriPhosporus T8 Tube and 10 pcs. of GE 40 Watts Plant and Aquarium light. I would like to know what is the best setup for this? To place 5pcs. T8 SPX50 together or 5pcs. of GE Plant and Aquarium Togehter or to have a combination of both. Thank you very much for all of your advise. I hope to hear from you very soon. Edison C. Yap