a. Auto low light mode will automatically adjust settings according to lighting conditions to achieve the best low light performance. Even if you move back and forth between bright and dark environments, you do not need to manually adjust the camera settings.You can set ISO at 6400, which is equal to auto, ranges from 100 - 6400, and it adjusts automatically.
b. Supported Resolutions: The low light option can only be turned on at 60fps