Moto G 2-gen - can I recalibrate automatic brightness mechanism? Is there any way to recalibrate/reconfigure automatic brightness behavior?

I would like to make it a little bit brighter in low light conditions.

I'm using Moto G 2-gen with KitKat without root access.
It is not possible to calibrate the mechanism normally. The screen brightness values are fixed.

You could use an app like Lux Auto Brightness to manage your screen brightness instead of using the default auto brightness setting. This isn't a perfect solution but it is probably the easiest to implement. Alternatively, you could root your phone and install the Xposed Framework. You could then use a module like Gravitybox to manually set your preferred auto brightness values.