I am planning on purchasing an ICE CAP 660 retro system with 4-36" bulbs. I know that 2 of the bulbs will be Actinic, but how should I know what color the other 2 bulbs should be? Actinic-White or Aqua Sun????? Does any one have any idea. My tank is a 65g and dimensions are 36L x 18W x 23H.