I have since added the Aquatic Life 48" DX as well and I run them at 4% starting at 0800 ramping up to 35% by 1000 and stays at 35% until 1600 and then ramps down to 4% at 1800
I run the Kessils as follows
Time Color Intensity
7:00 0% 20%
9:00 25% 50%
11:00 50% 50%
13:00 50% 50%
15:00 25% 50%
19:00 0% 0%