a system for changing a light source intensity comprises a controller , an input interface , and a memory . the input interface is configured to receive a command intensity for a light source , wherein the light source has a current intensity , and wherein an intensity of the light source is ramped toward the command intensity from the current intensity automatically . the controller is configured to determine a non - linear curve for the intensity of the light source , wherein at least a portion of the non - linear curve includes a beginning slope that is steeper than an end slope and to cause a change of a light source intensity by ramping over a time interval , wherein the light source intensity targets conforming to the non - linear curve for the intensity of the light source . the memory is coupled to the processor and configured to store an intensity value .