Dustin, For what it is worth... My cofig for T-5 is VERY blue/white (read not purple) and I went with 3 Actinic + bulbs and 1 10K bulb. I have not taken the par readings yet but they look pretty high. I wish I could take some pictures. If you wanted even bluer without a big drop in par, my best advice would be to go with all Actinic + bulbs. They are going to give you a very blue color with no white and still a good bang for your buck. I think I will have no problem keep clams or SPS in this light.