23e2d45c_isualizer_User_Guide___GeForce__Animation_Style
[Description] Combines with the “Variation” setting to adjust the brightness of the LEDs based on GPU temperature and other options. Please note that the setting is not available if “All LEDs” is selected. [Animation Style] 
Variable Brightness
GeForce Experience GeForce GTX LED Visualizer User Guide | GeForce
Animation Style