Stiff, it depends on what you are trying to acheive. A friend of mine has a 125, and wanted to bring out the blue colors in his silver aro. He didn't want to use all blue LEDs though. I set up his canopy with several single LEDs mostly white, there were I think 10 white leds and 3 blue. You always place a white LED in front of the blue, and then the blue LEDs will be hidden, but still cast their color. IMO blue LED moonlights already don't look natural. When you go with the singles you can make dark areas, and brighter areas. This will give you fish some option with where they want to be.