Since the Aurora pucks are very close to the EcoTech layout, check out the Ecotech Coral Lab study. What I found very interesting was how high they had the fixtures above the test tanks. They are cover the percentages of each of the colors used. Granted with the Aurora you can't quite mimic the study exactly due to 4 channels, but it gives a good idea. Logic would lead that lowering the fixtures/pucks with the lenses off should makes up for the intensities required with lenses on at a greater distance. The removal of the lenses definitely supports better blending of colors.