I am using 2 36" Current Nova Extremes on my 180g. They have 2 T5 bulbs. One bulb is a HO 10k daylight bulb, the other is a NON HO (High output) actinic bulb. To me, this gives just enough blue off to really bring out all colors nicely. I had the HO actinic bulb and it was too blue. You're going to have to experiment with combinations to see what you like. Here is a picture of the lights I have. In the picture, they don't show the 4 "legs" that let it sit elevated on the glass. http://www.aquariumcenter.biz/store/pro ... xtreme-FW/