Thanks! The dimmering is just done via a potentiometer (manual), but this function is really only there to set intensity/color blend of the LEDs. I have the drivers on two different timers, so the RBs come on first and go off last, to 'dummy' a sunrise/sunset effect. With the meanwells ( -P model), you can set them up to run off a controller. Then the dimming at sunrise/sunset could be automated. I don't run a controller as I like to do everything manually. I gladly take that piece of mind with the cost of the labor.