There is no set rule for acclimating your corals to LED lights.  We typically recommend starting out around 50% intensity for both white and blue.  Depending on tank size and number of modules, this might need to be lower or higher.  The acclimation period should be a few months long.  We recommend not starting to increase your intensity for a few weeks to a month after setting up the lights to allow the corals to adjust properly.  Please keep in mind that the blue and royal blue LEDs can do just as much harm to corals as the white LEDs.