We know that the lower the scree light/brightness, the lower the battery consumption.
There are some applications which provide ability (without root) to lower the brightness beyond the (default) limit.
So, I want to know does it really save battery? In other words, does it affect battery consumption comparatively to default minimum limit?
Btw, I'm also interested to know how does such application do this task if going beyond limit?
And is there any command-tool related to settings brightness level?